_Could I go to the movie this Sunday Dad? _ Yes you. But you come back before nine.A. s

问题补充：

_Could I go to the movie this Sunday, Dad?

_ Yes, you. But you come back before nine.

A. should, can

B. must ,have to

C. can , have to

D. need, must

答案：

A. should, can

B. must ,have to

(答案→)C. can , have to

D. need, must

解析：此题重点考查情态动词的基本用法。Could表示委婉语气而不是时态。Must表示命令意思是必须，表示主动，have to表示被动。