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【单选题】

A bridge goes ______ a river.
[ ]

A.
on
B.
over
C.
under
D.
through
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参考答案:
参考解析:
.
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举一反三

【单选题】—Are you a doctor or a nurse?—________.

A.
I'm a worker.
B.
I'm a teacher.
C.
Yes, I am.
D.
I'm a doctor.