Scientists are convinced ___ the positive effect of laughter ___ physical and mental health.
#28425
A
of; at
B
by; in
C
of; on
D
on; at
推荐题目
--Tom is very stupid. He fails in every exam. --_____, he is more lazy than stupid.        
#27336
A
On the other hand
B
On one condition
C
In my opinion
D
In other words
My sister was against my suggestion while my brother was ________it.
#25683
A
in honor of
B
in memory of
C
in search of
D
in favor of
I gave him a present but he gave me nothing ________
#28739
A
in cash
B
in relief
C
in charge
D
in return