7. B

8. D

9. C

10. C

11. C

26. B. is $\to$ are

Rewrite

1. The date of the meeting will have to be changed again.

2. He opened all the windows so as to get some fresh air.

3. The local man said that they would wait for the fisherman to return until it gets dark.

4. It was not until the war ended that he returned to his native village.

5. If my husband had left the car key, I could have picked him up at the station.

6. How many languages are spoken in Canada?

7. George is the most independable person (that) I have ever met.

8. How far and how much time did Betty swim? (không chắc)