单项选择题

He had already walked three or four miles ______ he saw a cart, half-full of hay, by the side of the road.

A．while
B．when
C．the moment
D．unless
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What a strange man! He loves his wife, but ______ he often beats her.
A．at a time
B．at one time
C．in time
D．at the same time
单项选择题
The road sign is easy to read; the words ______ well.
A．make out
B．stand out
C．work out
D．turn out
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