The scientists are studying the effects of human activities______the environment.
#29004
A
in
B
at
C
on
D
with
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We thought Tom wouldn't pass the exam, but to ___, he passed.
#28176
A
the surprise
B
my surprised
C
our surprise
D
our surprising
___ the employees' working efficiency, the supervisor will allow them to have a coffee break.
#29030
A
Improving
B
To improve
C
Having improved
D
Improved
Tell me ________ how it came about that you were 20 minutes late for class. You needn’t go into details.
#25593
A
in advance
B
in vain
C
in total
D
in brief
As time went by , the theory he had stuck ______ correct .
#27610
A
to prove
B
to proving
C
to proved
D
to be proved
--- I didn’t believe you made such a mistake. ---Oh, I’m sorry. I did it ___________. I’m serious.
#26905
A
on purpose
B
by accident
C
by the way
D
as for