Question

After they ________ cleaning the classroom, they ________ home yesterday.

A. finished; went
B. had finished; went
C. finished; had gone
D. had finished; had gone

Answer 1

答案B
本题涉及到过去的两个动作，即finish和go，但这一个动作有明显的先后关系，只有先finish cleaning the clssroom之后，go home这个动作才可以发生，故finish这一动作发生在went这个过去动作之前，finish应该用过去完成时，go应该用一般过去时。