Scientists are convinced ___________ the positive effect of laughter ___________ physical and mental health.
A. of; at B. by; in C. of; on D. on; at
Those who are not _______ with the progress they have made will work harder.
A. proud B. afraid C. popular D. content
He was in the mountain for a year. He felt as if he was ________ from the outside world.
A. cut out B. cut in C. cut off D. cut up
No matter where he is, he makes _________ a rule to go for a walk before breakfast.
A. him B. this C. that D. it
There is no point arguing about what ________ the accident. I’d rather you _________ the victims of it.
A. led to; focus on B. led to; focused on
C. caused; focus on D. caused to; focused to
----You’re coughing badly, Martin. Why not give up smoking?
---Give up smoking? Easier said than done, Amy. Once you ________ the habit of smoking, it is very hard for you to _______ .
A. keep up; break it away B. take up; drop it out
C. pick up; get rid of it D. build up; do away with it
