There were dirty marks on her trousers _______ she had wiped her hands.
#31676
A
when
B
which
C
where
D
That
推荐题目
In the final exam of last term, our maths teacher Mr.Wu gave us  ________we all couldn’t work out .
#33849
A
such a difficult problem that
B
so a difficult problem as
C
so difficult a problem that
D
as difficult a problem as
Have you noticed the problem ________ he is now in low spirits?________ come?
#30464
A
where;What
B
that;How
C
in which;For
D
what;As