单项选择题
Not until I began to work ______ how much time I had wasted.
A．didn"t realize
B．did I realize
C．I didn"t realize
D．I realize
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单项选择题
In the dark forests ______, some large enough to hold several English towns.
A．stand many lakes
B．lie many lakes
C．many lakes lie
D．many lakes stand
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