A ______ has been launched (发起) by the netzens on the Net to ______ unhealthy information which does harm to young students.
A. struggle; rid of
B. campaign; get rid of
C. battle; rid of
D. fight; get rid of
—I’m green at everything.
—Don’t worry. ______ you get older,you will get more experience.
A. As B. Till C. Unless D. Since
No one in the department but Tom and I ______ that the director is going to resign.
A. have known B. know
C. knows D. am to know
We shouldn’t complain about being poor, because many families are much ______ after the big earthquake.
A. better off B. worse off
C. well off D. badly off
It is ______ of you to call on your aunt from time to time.
A. common B. convenient
C. considerate D. concerned
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
A. of;onB. by;in C. of;at D. on;at