It was said was how the Chinese first raised silk worms.
#72116
A
that what
B
that which
C
that who
D
that that
推荐题目
The topic, _______ we devoted a heated discussion last night, is a hot issue at present.
#67312
A
which
B
where
C
to which
D
for which
Jack wasn’t saying anything，but the teacher smiled at him ________he had done something very clever．
#68350
A
as if
B
in case
C
while
D
though
_____ you may have, you should gather your courage to face the challenge.
#68233
A
However serious a problem.
B
What a serious problem.
C
However a serious problem.
D
What serious a problem.
On returning from work, _____.
#70204
A
John found a letter in the mailbox
B
a letter was found in the mailbox
C
a letter was in the mailbox
D
the mailbox had a letter in it
Now my idea of a university is still ______ it was ten years ago, a center of cultural life and a resource for the entire community.
#71506
A
what
B
whether
C
that
D
which