----Time to go to bed Mary.----Oh mum. I won’t go to bed I finishes my composition.A. a

问题补充：

----Time to go to bed, Mary.

----Oh, mum. I won’t go to bed I finishes my composition.

A. after

B. since

C. until

D. as soon as

答案：

A. after

B. since

(答案→)C. until

D. as soon as

解析：after在……之后；since由于，自从……以来；until直到；as soon as一……就……。玛丽，该睡觉了。——妈妈，我要直到我完成我的作文后才睡觉。结合y8uj可知选C。