单项选择题

It ______ until dusk that he realized that it was too late to return home.

A. was
B. wasn't
C. weren't
D. were
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It ______ the eldest son to make provision for his aged father.
A. lies in
B. lies off
C. lies to
D. lies on
单项选择题
I see perfectly what you are ______.
A. driving out
B. driving at
C. driving on
D. driving off
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