有关几道英语题目

1。People who want to lose weight should _________marathons.
A. compete in B. compete C. take part in D. attend
2. The building plans __________ the new construction requirements.
A. had to alter to suit B. had been altered suiting
C. had to be altered to suit D. had to alter to be suited
3. The CEO of the computer company avoided the financial _________ in the press conference.
A. issues B. point C. affairs D. topic
4. We should eat more foods _________ our daily vitamin___________.
A. supper , need B. supplying , needs
C. supervising , demand D. to support , want
5. Inside the pyramid _________ for the kings and the queens and long passages to these rooms.
A. the burial rooms are B. are the burial rooms
C. the burial rooms are there D. have the burial rooms
谢谢请给出答案与解答，最好每一个选项都有解释，谢谢~~~~~~~
真是十分感谢啊~~~~~~~
第一题是选A啊~~~~可是我不知道为什么选A啊~~~为什么大家都选C啊

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