单项选择题

Cars moved very slowly in the 1930s, but they ______ move more quickly than in the 1920s.

A．were to
B．did
C．will
D．can
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单项选择题
There are nine on the list, so you are ______.
A．an tenth
B．the tenth
C．an ten
D．ten
单项选择题
Never before ______ such a smoke in the room.
A．have I read
B．did I read
C．do I read.
D．am I reading
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