There _____ many kinds of birds around here, but now we seldom see them because of the
air pollution.

A. use to
B. use to have
C. use to be
D. are
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科目：初中英語 來源：同步題 題型：單選題

There _____ many kinds of birds around here,
but now we seldom see them because of the air pollution.
[     ]
A. use to
B. use to have
C. used to be
D. are

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科目：初中英語 來源：0103 期中題 題型：單選題

There _____ many kinds of birds around here, but now we seldom see them because of the
air pollution.
[     ]
A. use to
B. use to have
C. use to be
D. are

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There _____ many kinds of birds around here, but now we seldom see them because of the air pollution.
[     ]
A. had
B. used to have
C. used to be
D. are

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