It is generally believed that constant reading and comprehending can ______ our mental ability of comprehension while physical exercise can help build up our body. 
#13994
A
stress
B
effect
C
strengthen
D
decide
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He was a heavy smoker. I _______ him to give up smoking but he just wouldn’t listen to me.
#12230
A
suggested
B
tried to persuade
C
persuaded
D
tried to advise
It was very kind of you to do the washing-up, but you _____ it.
#13892
A
needn’t do
B
shouldn’t do
C
mustn’t have done
D
needn’t have done
、If the restaurant failed to make enough money, they would        
#12491
A
close down
B
call off
C
turn down
D
set off