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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____ the help of experienced career instructors, this type of job-hunting training ____ to be very efficient.
#28456
A
By; has proved
B
With; has proved
C
Under; is proving
D
With; is proved
The equipment for disabled people should be ______ easy reach in public places.
#25613
A
beyond
B
near
C
within
D
around
--- I’m going to have lunch. Do you mind talking about your plan _____ lunch? ---All right.
#26587
A
during
B
before
C
over
D
until