Our maths teacher set so difficult an examination problem ______ none of us worked out.
#76873
A
which
B
that
C
as
D
so that
推荐题目
The School Art Festival has set up a stage ______students can show their talents.
#76123
A
which
B
where
C
that
D
when
Mark Twain worked for several years as a pilot on a steamboat, taking passengers up anddown the Mississippi, the great river ___flows from the north of the US near the Canadianborder.
#77611
A
as
B
what
C
which
D
who
Is this the reason at the meeting for his carelessness in his work?
#77957
A
he explained
B
what he explained
C
how he explained
D
why he explained
The reason I have to go is my mother is ill in bed.
#76276
A
why...why
B
why...because
C
that...because
D
why...that