Question

【题目】Our maths teacher ____ the post office when I _____ him.
A.was passing; saw
B.passed; was seeing
C.passed; had seen
D.was passing; was seeing

Answer 1

【答案】A
【解析】句意：当我看见我们数学老师的时候，他正经过邮局。see是瞬间动词，故用过去式；pass是延续性动词，表示我看见他的时候正在经过，故用过去进行时。因此选A。