测试精编：

1. -Let's hurry! The president is coming. -Oh, I was afraid that we ________.

A. already miss him            B. had already missed him

C. will miss him already         D. have already missed him

2. Your letter came just as I ________ my office.

A. was leaving                B. would leave

C. had left                    D. left

3. I ________ my keys, I can't remember where I last sawthem.

A. was losing      B. lost        C. had lost       D. have lost

4. Nobody knew where the teacher ________.

A. has gone                   B. would have gone

C. had gone                   D. would be gone

5. The sportsmen ________ training for 3 hours when the coach told them to break off for rest.

A. have been      B. are

C. had been       D. were