----How unhappy your roommate looks!----Yes，but he’s not willing to tell me what it is____ is troubling him.
#85453
A
what
B
which
C
as
D
that
推荐题目
（福建省龙岩市2011届高三第一次质量检查）— ______you write so well? —By reading and keeping diaries every day.
#84667
A
How is it
B
What is it
C
How is it that
D
What is it that
Wealth is important but as a matter of fact , I think , _____ is health that counts.
#84714
A
which
B
what
C
there
D
it
Could it be in the room____ we had a talk last night ____ you left the key?
#84660
A
that; where
B
where; when
C
where; that
D
in which; where
— Is it my age ______the boss minds?—I’m afraid so. He will consider ______ necessary to have an experienced assistant.
#85179
A
which；it
B
that；it
C
which；that
D
that；that
It was 80 years before Christopher Columbus crossed the Atlantic Zheng He sailed to East Africa
#85222
A
when
B
that
C
after
D
since