英汉互译

1. When I met him, he was instructing his son how to deal with the car problem.

2. She instructed me in the use of the computer.

3. 老师命令我们下课后把试卷交上。

4.他吩咐我把这些花送给顾客。

交班前，采煤机检修工对检修情况进行（）次自查，找出遗留问题。

A.二

B.一

C.三

D.四