The boss has given everyone a special holiday, so we _____ go to work tomorrow.
| A．can’t | B．mustn’t | C．needn’t | D．shouldn’t |
Whether ways will be found to stop pollution or not is just___________ worries the public.
| A．why | B．which | C．that | D．what |
The plan __________just because people were unwilling to cooperate.
| A．broke down | B．pulled down | C．turned down | D．put |
The customer bargained with the shopkeeper for a long time, and finally they agreed ___________ the price.
| A．to | B．with | C．on | D．at |
Having received___________ training of the MS. Company, he was offered important position in management.
| A．the;an | B．不填;an | C．the;不填 | D．a;a |
He must have attended the meeting yesterday,___________ he?
| A．didn't | B．mustn't | C．needn't | D．hasn't |