Scientists are convinced the positive effect of laughter_____physical and mental health.
#26000
A
of, at
B
by, in
C
of, on
D
on, at
推荐题目
Lily got up at 6 o’clock ，but she realized it was Sunday as soon as she prepared her school bag.
#25558
A
as possible
B
as usual
C
at present
D
at last
I was deeply impressed ________ the speech by the mayor of Shanghai before the final voting for EXPO 2010.
#25518
A
to
B
on
C
over
D
with
The arrangements for the English evening this weekend aren’t all_______；we needed another thirty chairs.
#26311
A
in return
B
in advance
C
in ruins
D
in place
．You can't see the___________ now for they are having a meeting at the moment．
#27614
A
editor-in-chiefs
B
by an hour
C
by hour
D
each hour