--Are you sure ____ you have seen this man?---Yes, I’m quite sure ___that.
#71728
A
that, about
B
/, to
C
of, about
D
about. of
推荐题目
________there are a large number of chemical factories, the air is likely to be polluted.
#68049
A
Where
B
That
C
Though
D
As
________ is where he gets all his money from.
#69169
A
What I can’t understand it
B
That I can’t understand
C
What I can’t understand
D
Which I can’t understand it
____ printed, this science fiction will be popular among the students.
#67782
A
Before
B
Unless
C
When
D
Once
