请帮忙解答几个高中英语选择题,谢谢!
1.People can’t afford to buy expensive things___the prices of daily goods going up.
A.as B.for C.with D.since
答案：C
2.I’m Chinese and I do feel___Chinese languageis___mostbeautiful language.What’s your opinion?
A.the;a B./;the C.the;/ D./;a
答案：A（顺便解释一下什么时候用the/a/不用冠词）
3.The reporter has written___articles about air pollution hoping to call the attention of all people to the problem.
A.a series of B.a great deal of C.a plenty of
D.a large amount of
答案:A.
4.The film Curse of the Golden Flower was made___on Cao Yu’s play Thunderstorm.
A.base B.to be based C.based D.basing
答案：C
5.The money collected should be made good use___the people in Sichuan Province who suffered a lot in the earthquake.
A.of helping B.to help C.to helping D.of to help
答案：D
请详细解释一下