1.The last decade has witnessed the____________(accelerate) in the rate of economic growth.

2.I didn’t understand the____________(significant) of her look.

3.Before going home, he always gets the message______(delete) from the phone.

4.This is an old vase________(date) back to the Ming Dynasty.

5.He failed again£¡If only he had________(have) more courage!

6.Oh, you have come at last£¡I have been________(wait) for you for two long hours.

7.The telephone has been________(ring) for almost a minute.Why doesn’t someone answer it?

8.—It was a pity that you missed the famous star yesterday.

—If only I________________(not, return) to my hometown!