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
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The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.
#25574
A
on call
B
by hand
C
in sight
D
on spot
The success of a government should be measured ____ the health and happiness of the people as well as the development of the economy.
#25719
A
in face of
B
in place of
C
in terms of
D
in line with
In order to develop the city, the government tries to beautify it as soon as possible. Several new special projects are ______.
#26770
A
under construct
B
under building
C
under way
D
under repair