单项选择题

A．There are over 1,000 miles of track in Britain.
B．In Britain there are about 250,000 miles of track.
C．There are over 13,000 miles of track in England.
D．In England there are 133,000 miles of track.
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单项选择题
A．The man’s watch goes too fast.B．The woman’s watch stopped 2 hours ago.C．Neither of their watches keeps good time.D．It’s too dark for the woman to read her watch.
A．The man’s watch goes too fast.
B．The woman’s watch stopped 2 hours ago.
C．Neither of their watches keeps good time.
D．It’s too dark for the woman to read her watch.
单项选择题
The overall effect of this passage is likely to make the reader feel ______.
A．enthusiastic about biotechnology
B．very worry about genetic engineering
C．reluctant to try new plant combinations
D．alarmed about limitless experiment
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