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Researches are convinced ______ the positive effect of laughter ______ physical and mental health.
#26134
A
of; at
B
by; in
C
of; on
D
at; on
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The competition between the two restaurants was______.
#27357
A
in
B
on
C
away
D
out
He left ________any of his friends _________ him _________.
#26830
A
with; seeing; of
B
without; seeing; off
C
without; see; /
D
with; see; out
 I met this guy _____ some other occasions but he did not seem to recognize me.
#27401
A
for
B
on
C
at
D
in
_________ a bed, the room is almost empty.
#27346
A
Besides
B
Except
C
Apart from
D
But
______ his return from Europe , he set to work on the project..
#25987
A
As
B
At
C
Upon
D
For