单项选择题

Though Mary continued working, she kept looking at the clock (), thinking of her sick baby in hospital.

A.all the time
B.at once
C.after a while
D.for a moment

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I don't think he will come to our party, ().

A.will he
B.won't he
C.does he
D.do I
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Before building a house, you will have to () the government's permission.

A.get from
B.follow
C.receive
D.ask for
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