Great changes______ in the city since1970.

The Whites ___________ many places of interest since they came to China.

This village is rather poor. What should the government officers do first if they want to __________ it?

Did you see who the driver was?— No, so quickly_____that I couldn’t get a good look at his face.

Amy , I would like your uncle to help me repair the computer. —Sorry, he _____help you today . He won’t come back until tomorrow.