The scientists are studying the effects of human activities______the environment.
#29004
A
in
B
at
C
on
D
with
推荐题目
________ my surprise, ________ I could have a word with him, he left.
#26171
A
In; before
B
To; before
C
In; when
D
To; since
It’s not a good idea to spend your income________.
#26842
A
in general
B
in defence
C
in advance
D
in particular
.– You are not afraid of snakes, are you?--- No, certainly not. Not rats, not flies, and ____ ants.
#27596
A
at best
B
at least
C
best of all
D
least of all