The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences．
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to which
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with which
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in which
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for
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What should the people do to solve the food problem if they live in hilly areas ____ is hard to grow crops?
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where
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when it
C
that
D
where it
What especially impressed us was the way_____the girl studied foreign languages.
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不填
B
which
C
by which
D
how
Wait till I turn on my computer, _____ there is his telephone number.
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A
there
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where
C
which
D
in that
If we have a strong will, we can overcome any difficulty ______ it is.
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A
what
B
how
C
whatever
D
however
（湖南省怀化市2014年高三第二次模拟考试）21. For more information, please send an e-mail, ______ you can also include your advice to us.
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when
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where
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which
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that