It was a very long day for Jack. He didn’t get home from school six o’clock.A. sinceB. to

问题补充：

It was a very long day for Jack. He didn’t get home from

school six o’clock.

A. since

B. to

C. by

D. until

答案：

A. since

B. to

C. by

(答案→)D. until

解析：本题考查介词。not until直到…才。句意：对杰克来说是很长的一天。他直到6点钟才从学校回到家。