Scientists are convinced _____the positive effect of laughter _____physical and mental health．
| A．of ;on | B．by; in | C．of ; at | D．on ;at |
The medical team arranged to Africa _________five doctors and two nurses.
| A．consists of | B．is consisted of | C．makes up | D．is made up |
Our daughter doesn’t know what to ______ at the university; she can’t make up her mind about her future.
| A．take in | B．take over | C．take up | D．take on |
______ from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise.
| A．Freed | B．Freeing | C．To free | D．having freed |
— Tom, you are caught late again.
— Oh, ______.
| A．not at all | B．just my luck | C．never mind | D．that’s all right |
Kathy’s cat is so cute and lovely, but I don’t think I have enough time to keep ______.
| A．this | B．that | C．it | D．one |