—The project wasn’t’ difficult for him, was it ?
— . He should have been given a more difficult one .
| A．No, it was | B．Yes , it was | C．Yes , it wasn’t | D．No , it wasn’t |
I should not have laughed if I _________ you were serious.
| A．thought | B．would think | C．had thought | D．have thought |
On the Eve of the Spring Festival, we Chinese people like to play with fireworks, and the noise doesn’t ________ until after midnight.
| A．die from | B．die off | C．die out | D．die down |
The children, ________ had played the whole day long, were worn out.
| A．all of what | B．all of which | C．all of them | D．all of whom |
We are confident that the environment ________ by our further efforts to reduce pollution.
| A．improves | B．will be improved | C．has improved | D．was improved |
— Where did you find the professor who made the speech yesterday?
— It was in the hall_______ the students often have a meeting.
| A．where | B．which | C．that | D．when |