Scientists photographed for the first time ever _____ wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.
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A
which
B
what
C
that
D
when
推荐题目
.The teaching building is _________ by many trees, some ______ over 30 metres.
#4739
A
surrounded, measuring
B
surrounded, measured
C
surrounding, measured
D
surrounded, measure
It made all the Chinese happy _______ China succeeded in sending up ShenzhouⅦ．
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A
when
B
which
C
that
D
If
______ students up to 2, 000 , the school has built another laboratory．
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A
As
B
For
C
with
D
Since
.The World Health Organization gave a warning to the public without any ______when the virus of H1N1 hit Mexico in April, 2009.
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A
delay
B
effort
C
schedule
D
consideration
We all hope that our head teacher is both strict ______us and friendly _____ us.
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A
in, to
B
in, for
C
with, to
D
with, for