完成时专练

　　完成时是高中英语语法学习的重点和难点之一，之前我们已经学习了各种完成时的详细用法，下面让我们通过练习来复习巩固一下。

【练习】用括号内所给（短语）动词完成式的适当形式填空。

1. Finally Jackson received the novel he ________ (expect).

2. By this time tomorrow you ________ (get) the answer from the research centre.

3. We missed the beginning. When we got to the field, the football match ________ (start).

4. When you come at ten, we ________ (collect) all the materials you need.

5. It's the forth time you ________ (arrive) late this week.

6. We all know that they ________ (do) everything possible to improve our working conditions all the time since our arrival.

7. Henry ________ (offer) me a drink before I took off my coat.

8. We ________ (discuss) the problem for half an hour when Brant came in.

9. The workers say that they ________ (finish) the downstairs room by Wednesday.

10. If we ________ (use) computers, we could have solved the problems earlier.

11. -Oh no! We're too late. The train ________ (leave).

-That's OK. We'll catch the next train.

12. -Where have you been? I ________ (look for) you everywhere.

-I ________ (work) in the laboratory.