单项选择题

When I came through the customs at the airport, I had to pay（）on a clock I had bought.

A.taxes
B.duty
C.fines
D.fees

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Each year in the United States, many black teenagers（）of school, either because they cannot keep up or they have to work to support their family.

A.go out
B.drop out
C.check out
D.pull out
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Attendance at football matches have（）since the coming of television.

A.dropped in
B.dropped off
C.dropped out
D.dropped down
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The engine has broken and the boat is（）on the water.

A.flowing
B.floating
C.drifting
D.sailing
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The terrible noise is（）me mad.

A.turning
B.setting
C.driving
D.putting
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Let's drink（）Dicks' success in business.

A.of
B.for
C.to
D.with
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The student found the novel（） It provided him with so much information about the subject.

A.enlightening
B.confusing
C.frustrating
D.delighting
单项选择题
A baby might show fear of an unfamiliar adult,（）he is likely to smile and reach out to another infant.

A.if
B.wherever
C.so that
D.whereas
单项选择题
（）with the size of the whole earth, the highest mountains do not seem high at all.

A.If you compare
B.Compare them
C.When compared
D.A comparison
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It is useful to science（）the earth as an object in space.

A.to consider
B.which considers
C.considers
D.the consideration of
单项选择题
We must（）that the experiment is controlled as rigidly as possible.

A.assure
B.secure
C.ensure
D.issue
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