What do you call the student who changes to another contry's college to study? What do you call the student who changes to another contry's college to study for a semester or a year and then come back? Like"exchange student" or something else?

fictitious & fictive & fictional & imaginary Hello. I want to ask you if there are any differences between "fictitious" "fictive" and "fictional"? They are so similar that I guess they have the same meaning and usage? What's more, what about "imaginary"? What're the differences between these four words? Thank you!

the difference between "the first time to do" and "the first time doing" Hello everyone! I want to ask you the difference between "the first time to do" and "the first time doing". How should we use them in different situations? Can you give me some examples? Thanks!

People sleeping 7 hours a day are more likely to die earlier?! I've just heard from one of my oral English teachers yesterday that people who sleep 7 hours a day are more likely to die earlier. He said he saw it from a science report. Well, it's my first time to hear that and honestly, I don't believe it. Cause he said if you slept 6 hours or 8 hours that's OK, but only 7 was not accepted. So why? Why exactly 7? Have you ever heard this before? What do you think？ I hope you can give me some suggestions about my composition and tell me your opinion if you like. Thank you!

health examination or health testing? I wonder which you would like to say --- health examination or health testing, or any other phrases that express the same meaning? Which one is more common in English?

Some questions about "big fish in a small pond" I just learned the idiom--"big fish in a small pond" today and the meaning of it in the internet is "one of the most important people in a small group or organization, who would have much less power and importance if they were part of a larger group or organization". I understand the former part of this sentence, but does the later part means that "a big fish in a small pond" can only be famous in the small area and once they come to a bigger environment, they will centainly be very normal?

what's the phrase used to describe that you finish something using just one opportunity in English? I wonder what's the phrase used to describe that you finish something using just one opportunity in English. I looked up to the dictionary and it told me the answer was "at once", but doesn't "at once" mean "immediately"? So can you give me some advice? I don't know whether you can understand what i mean. You can just choose some words to complete the following sentence--"You have to finish that task __________ beacuse you don't have another opportunity to try it again". What should I put to fill blank? Thank you!

Please help me correct these sentences 0924 1.When reading of this paragraph, she suddenly started to cry. I dreamed of my grandfather last night. 2.The past few years witnessed the great influx of migrant workers from the countryside to big cities, where they could found a decent job and raise their families. 3.There is growing interest in English. There is general agreement that women should enjoy full equality with men. 4.Cut off from outside by mountains, this village lives peaceful and harmonious life. 5.But there are still some parts of World where even now people cannot satisfy their hunger. 6.To preserve his eyesight, his mother asked him not to watch TV for more than one hour. We should try our best to preserve natural resources. You are supposed to reserve your energy for next competition. I have called to make a reservation. 7.The only thing you should do now is apology to her. It's a ring handed down from my grandmother. 8.She is one of my distant relatives. Our remote ancestors came from Africa. 9.The rules in school don't bear the slightest resemblance to those in society. 10.Family shapes a person's personality. There's someone thundering at the door. The city was veiled in terror. 11.It's 11pm now. You should have finished your homework! It must have rained because of the wet ground. 12.The cat slipped out of the house and then disappeared without trace. 13.Early mountaineers tended to find the easiest way to the summit, which is totally different from modern alpinists. 14.He is proud of being a young pioneer. A founder of an enterprise should has pioneering spirit. The result of this new research broke new grand in this area. This company is leading the way in developing environmental-friendly product. 15.The leaders of these two countries have reach an agreement to hold a summit next month. The chairman of this company left at the pinnacle of the company's development. 16.The path across the mountain is very perilous. The plane is in grave peril at that time. The carelessness of workers can cause fire hazard. The busy traffic entrance present a hazard to pedestrians. He thought her recent outstanding performance constituted a threat to the teacher's care for him. Terrorism posts a threat to the stability of our country. 17.He shuddered at the thought of his father. He is trembling in the cold wind.

Please help me correct these sentences 0923 1.There is something in the region of 550 kids in this school. There is something like 6,000 spiders in this area. 2.A football pitch is much bigger that a basketball court. The area of a football pitch is equal with a soccer field. During competitions, both referee and competitors are in one boxing ring. There is a race on the skating rink. He is standing on the center of the baseball diamond, asking for our help. They will have their exercise on the golf course. 3.Talking with you in this way is beyond my wildest dreams. 4.To be excellent is more than to be diligent. 5.He is an ambitious man, not content with the dull routine of everyday life. 6.What he said was altogether based on his own will. 7.She just glanced up quickly to see who came in. 8.I have told you a minimum of a week ago. 9.Alpinism is a dangerous sports but that's what a mountaineer looks for. He was a good alpinist at his younger time. No not is not impressed by the beautiful scene of the Alps. 10.She has recounted the event of last night to me. He would be angry if the important things of his son are not related to him. He always tell others his friends' secret. 11.This novel narrates things happened in the 20th century. Our teacher asked us to write a narrative about our daily life. 12.The money you spent in the early ten days accounts for almost half of your expenses. After accounting for this thing to you, I feel more relaxed now. A group more than six can get 20% discount. 13.There are a lot of sagas of Chinese history. Home's epic is one of the greatest epics in the world. There is a legend in China that a monster called "nian" would appear at the end of each year. Nvwa is a legendary character in Chinese mythology. 14.The smiths has migrated to China a week ago. My mom, an immigrant from India, is an excellent doctor. She plans to emigrate to Australia next month. 15.They have the same ancestors. He wished his descendants are upright man. I don't want our dispute passed to our offspring. 16.Too much candy will rot your teeth. Too many sweets will make your teeth rotten.