—What will you do next Sunday? —Maybe do some shopping for I go to school on SundayA. mu

问题补充：

—What will you do next Sunday?

—Maybe do some shopping, for I go to school on Sunday．

A. mustn’t

B. shouldn’t

C. don’t have to

D. had better not

答案：

A. mustn’t

B. shouldn’t

(答案→)C. don’t have to

D. had better not

解析：考查情态动词。mustn’t 禁止，shouldn’t 不应该，don’t have to 没有必要，had better not 最好不，句意：下周日你干什么？也许买东西，因为在周日我不必去上学。所以选C。