Scientists are convinced_____the positive effect of laughter_____physical and mental health.
#28733
A
of; at
B
by; in
C
of; on
D
on;at
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Scientists are convinced______ the positive effect of laughter______ physical and mental health.
#26517
A
of ; at
B
by ; in
C
of ; on
D
on ; at
— Sorry, I'm afraid the project will be delayed. Time is so limited! — Take it easy. You will have two assistants ______.
#25212
A
at your command
B
at your expense
C
at your convenience
D
at your sacrifice
the numbers in employment, the hotel industry was the second largest industry in this country last year.
#26559
A
In spite of
B
ln case of
C
In terms of
D
In praise of
I am anxious about what notes he made in the back of his diary ________ things to mend or replace.
#28565
A
by
B
in
C
with
D
of