单项选择题

There are (hundred) (of kinds) of cheeses, and (they) differ in taste, texture, and (appearance).

A．hundred
B．of kinds
C．they
D．appearance
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(Having been) finished (his) breakfast, (he) went out (for) a walk.
A．Having been
B．his
C．he
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单项选择题
He had trouble (finding out) (that) the capital of the country (lay in) the coastal area or (in the mountains.)
A．finding out
B．that
C．lay in
D．in the mountains
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