— Mary’s sister looks very beautiful now.
— But she was very ugly before she tidied up her appearance（整容）. You _________ believe it!
| A．shouldn’t | B．mustn’t | C．wouldn’t | D．might not |
-I'm sorry, I shouldn't have been so rude to you.
--You___________ your temper but that's OK.
| A．have lost | B．had lost | C．did lose | D．were losing |
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 (合作).
| 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 |