单项选择题

A．early
B．more
C．ago
D．long
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单项选择题
A．protectedB．covered byC．likeD．covering
A．protected
B．covered by
C．like
D．covering
单项选择题
What de we learn about much of the drained land in Holland
A． Above sea level.
B． Below sea level.
C． At a changing level.
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