单项选择题

It was in the winter of 1951 ______ a heavy fog moved into London.

A．that
B．then
C．when
D．空
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单项选择题
The desk over there ______ hard wood.
A．is made of
B．is made from
C．is made up of
D．is made by
单项选择题
______, the more you are aware of content and meaning.
A．The more words you are familiar to
B．The more words you are familiar with
C．You are familiar to more words
D．You are familiar with more words
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