The research is so designed that once _______ nothing can be done to change it.
| A．begins | B．having begun |
| C．beginning | D．begun |
True happiness does not lie in theof money, but the joy of achievement.
| A．profession | B．possession |
| C．permission | D．popularity |
The engine of the ship was _____ and the coming typhoon added to the helplessness of the crew at sea.
| A．out of order | B．out of shape |
| C．out of question | D．out of place |
—Did Zhou Libo say anything that appealed to you in Mr Zhou Live Show?
—_____！Actually I slept through his performance.
| A．No problem . | B．No wonder |
| C．No doubt. | D．Not really. |
Unable to find jobs, many young people take to illegal behavior, such as stealing, and were usually the main suspects _____ anything went missing.
| A．since | B．unless | C．when | D．though |
Provided that they are fit, I see no reason why they _____ go on playing basketball for another four or five years.
| A．needn’t | B．shouldn't |
| C．mustn’t | D．oughtn’t |