1. I can be answered the question.

2.she could be carried the box

3.you should be opened the window 

4 we might be played cards

5. you ought to be washed the car

6. he must be filled in the form.

7 . could you be fed the dog ? 

8 could jenny locked the door?

11. B                    15. D

12.C                     16.B

13.A                      17.C

14.C                      18.A

13. I will be meeting Laura at 9 o’clock tomorrow.

14. By the age of 25, he had written two famous novels.

6C

7B

8A

9A

10C

1. If the we have more cars, air pollution in our city will become worse.

2. The victims were provided with food and water by the rescue team.

3. Because of the polluted environment, many new diseases have appeared.

Ex1:

1-A                2-B                     3-C                    4-B

Ex2:

5- C                6-  D                   7 - C                     8-  A

Ex3:

9-C                     10- A                     11- B                      12- C             13-D

D

1-had

2-took

3-talked

4-spent