The book has helped me greatly in my daily communication, especially at work ________ a good impression is a must.
#66634
A
which
B
when
C
as
D
where
推荐题目
– Can you tell me ___________? – An engineer from Jinan Iron and Steel Plants．
#70543
A
what your friend is
B
who your friend is
C
what is your friend
D
who is your friend
Students shouldn’t be given so difficult a problem ______they can not work out.
#72482
A
that
B
which
C
while
D
as
It is not always easy for the public to see _____ use a new invention can be of to human life.
#68925
A
hose
B
what
C
which
D
that
I was about to leave the office ______ the telephone rang．So I stopped ______ it．
#70104
A
when; to answer
B
when; to reply
C
while; answering
D
as; replying