在学习英语的过程中，掌握各种时态是非常重要的。今天我们就来一起复习和练习英语中的过去完成时。过去完成时主要用于描述在过去某个时间之前已经完成的动作或状态。它通常由“had + 过去分词”构成。

练习题：

1. By the time he arrived, the movie ____________ (start).

2. She ____________ (finish) her homework before she went out to play.

3. When I got to the station, the train ____________ (leave).

4. They ____________ (not see) each other for five years when they met again.

5. By the end of last year, we ____________ (complete) all the projects.

6. He ____________ (read) three books by the time he was ten.

7. The teacher told us that the earth ____________ (go) around the sun.

8. When I called you, you ____________ (already leave) the office.

9. By the time she saved enough money, the price of the car ____________ (rise).

10. He said that he ____________ (visit) many places in China before.

答案：

1. had started

2. had finished

3. had left

4. hadn't seen

5. had completed

6. had read

7. goes

8. had already left

9. had risen

10. had visited

希望这些练习题能帮助你更好地理解和运用过去完成时。记得多加练习，熟能生巧！如果你有任何疑问，欢迎随时提问。