(2013·重庆模拟)—When did your brother begin to show his interest in medicine? —It was a Saturday he noticed his classmate experimenting on a frog in the lab.
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A
that
B
what
C
when
D
which
推荐题目
It is in Qingdao_____ you’re going to pay a visit to _____ this kind of washing machine is produced.
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A
/; that
B
where; which
C
/; where
D
that; which
In the cafeteria, I saw my sister and her three friends, none of ____ I had ever seen before.
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A
them
B
which
C
whom
D
those
What surprised me was not what he said but _________ he said it.
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A
theway
B
inthewaythat
C
intheway
D
thewaywhich
Encouraged by my science teacher, I set about my studies on developing my product, _____I hope I will succeed in applying for a patent（专利）.
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A
with whom
B
to whom
C
through which
D
for which