If meaning "cost a lot", "dear" and "expensive" are the same. "arrive" is used when the whole thing (person or object) gets to the place, but "reach" can be used when only part of it gets there. For example, "I can't reach the remote control" means your hand can't get there but we wouldn't use "arrive" because you haven't moved to a different place A "present" is normally an object and you are usually there to give it to the person. A "gift" is something you give for free but doesn't have to be a present. Here "pupil" is for children at school (who have to attend by law, wear school uniform, etc.) and "student" is for people at college/university/etc. When you have a bath, you fill the bathtub with water and lie down in it. When you have a shower, the water goes down the drain straightaway as you stand up in it.

*dear can be used for humans and things expensive for things only *reached + destination arrived at +destination *gift something you given to you and shouldn't be turned back , its for free it also mean something was given to you for ever EX my mind is a great dift from god present something is being given in occasions , birthday , wedding ....etc *pupils & students :( i don't know *shower : going to the bathroom and take your clothes and make water cover all your body bath : going to the bathroom to use it for any thing wash your face , pee , .... etc