Scientists are convinced the positive effect of laughter physical and mental health.
| A．of; at | B．by; in | C．of; on | D．on; at |
相关试题
31.— Is Bob still performing?
—I am afraid not. He is said _______ the stage already as he has become an official.
A．to have left |
B．to leave | C．to have been left | D．to be left |
30.— Hello! Golden Bay Ressort! Can I help you?
— Do you have a room _____ for this weekend?
| A．present | B．handy | C．available | D．operational |
29._____ to sunlight for too much time will do harm to one’s skin.
| A．Exposed | B．Being exposed | C．Having exposed | D．To expose |
28.The police were trying to _____ the suspect’s motive of killing his wife.
| A．single out | B．catch on | C．stop off | D．figure out |
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