When_____the accident________?
| A．was; happened | B．has; happened | C．was happebeing | D．did; happen |
I think _______ impresses me about his painting is the colours he uses.
| A．what | B．that | C．which | D．who |
The two countries are going to meet to _______ some barriers to trade between them.
| A．make up | B．use up | C．turn down | D．break down |
English is a language shared by several diverse cultures, _________ uses it differently.
| A．all of which | B．each of which | C．all of them | D．each of them |
We won’t start the work until all the preparations __________.
| A．are being made | B．will be made | C．have been made | D．had been made |
---How long have you been learning English? ----_________! Your English is so good.
| A．You can’t be serious | B．You got it |
| C．I couldn’t agree more | D．I’m stuck |