Not until ________did he leave.
| A．I came back |
| B．did I come back |
| C．came back I |
| D．came I back |
Tom had to have his car repaired in a garage because it______seriously.
| A．damaged | B．was being damaged |
| C．had damaged | D．had been damaged |
—It______________to plant trees and grass on the hillside.
—Yes. They help stop soil from being washed away.
| A．makes sense | B．makes money |
| C．makes a living | D．makes a mistakes |
They’ve finally decided to put an end to the long and bitter________between them and make peace.
| A．survey | B．conflict | C．concern | D．request |
Stephen Hawking believes that the earth is unlikely to be the only planet_______life has developed gradually.
| A．that | B．where | C．which | D．whose |
Between the two generations, it is often not their age, _________their education that causes misunderstanding.
| A．like | B．as | C． or | D．but |