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
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I’ll go to your party___ you promise me that you will invite our class advisor.
#26837
A
if only
B
only if
C
unless
D
since
We have already placed an order ____ that company _____ the machines.
#27602
A
for; with
B
for ; for
C
with; for
D
to; with
When he knew the disappointing result of the exam, he seemed quite _______.
#27500
A
fed up
B
cast down
C
in vain
D
in amazement
He was a good student and scored(得分) _______ average in most subjects.
#26699
A
below
B
of
C
on
D
above