Scientists are convinced ________ the positive effect of laughter ________ physical and mental health.
#25675
A
of; at
B
on; at
C
by; in
D
of; on
推荐题目
 The restaurant is _________my uncle.
#25998
A
in charge of
B
in the charge of
C
in exchange for
D
by the means of
There is, __________ , one further point to make.
#26079
A
in peace
B
in addition
C
in cash
D
in relief
 I’m ______ a diet, since I put ______ weight easily.
#25863
A
in; on
B
on; in
C
in; in
D
on; on