—How unhappy your roommate looks!—Yes, but he's not willing to tell me what it is _______ is troubling him.
#72642
A
what
B
which
C
as
D
that
推荐题目
_____ is known to everybody, the moon travels round the earth once every month.
#71901
A
It
B
As
C
That
D
What
If it ______________ tomorrow, I would stay at home watching TV.
#66958
A
should rain
B
rains
C
was to rain
D
will rain
It was because he was seriously ill _________ he was late for school.
#71019
A
that
B
which
C
so
D
what
I’ll go to America to strengthen my English_______ it isn’t too expensive.
#72064
A
except
B
provided
C
assumed
D
unless
The man_____ was an old classmate of mine.
#73862
A
you just talked to him
B
who just talked to
C
you just talked to
D
whom you just talked