Hi! I just heard this site from my teacher so I registered it today and I decided to answer some questions first. Most of the answers that these guys gave had made unnecessary paraphrases(changes) of your original scentences. Here are my opinions of your questions.(Please forgive my poor English) 1.中国政府认为计划生育政策关系到直接中国经济的发展. It should be ".........直接关系到中国经济的发展." or it can be "中国经济的直接发展." Well, I think that the best explain of this sentence"直接" Should be after a verb, and "中国" is a noun, and "直接中国" Sounds like " straightly China" , it has no logic connection. Words like "直接" shold be before the action that is "直接", not after it. 2.从去年以来, 就她每个月给父母寄生活费. 从去年以来，她就每个月给父母寄生活费. Just a little mistake of the positons of "就" and "她". 3.尽管经济在不断发展, 总是不能很快地提高人民的生活水平. 虽然经济在不断发展, 可是发展不能很快地提高人民的生活水平. or 虽然经济在不断发展, 可是人民的生活水平不能很快地提高. First, it is the logic conection between "经济在不断发展," and "总是不能很快地提高人民的生活水平." I mean that the word "尽管" & "总是" Shuoldn't be together. there are many correct combinations of words to fix it, like "尽管…可是…" "虽然……但是……" And these "combinations" are called "关联词", I can give you a list of it if you wish. Secondly, there should be the "subject" after 关联词. 4.我都一直很喜欢看中国武打电影. 我一直都很喜欢看中国武打电影. A simple mistake, just need to change the position of "一直"&"都". 5.有不少外国朋友对中国的计划生育政策有看法的. 有不少外国朋友对中国的计划生育政策是有看法的. or 不少外国朋友对中国的计划生育政策有看法. the problem of it is kind of like sentence 4.

They gave answers that are too complex. 适可而止="It's enough" Use it when you can't stand one kind of action anymore.

In this setence, “的”is probably just like the word "that" in "were did you hear that?"