摘要： This is key and that is umbrella. A. an, a B. a, an C. a, a D. an, an

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This is ______ key, and that is ________ orange.

A. a; a B. a; an C. an; an

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This is key and that is eraser.

A. a, a B. a, an C. an, a D. the, an

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This is _________ key and that is ________ eraser.

A. a, a
B. a, an
C. an, a
D. the, an

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This is key and that is eraser.

A.
a, a
B.
a, an
C.
an, a
D.
the, an

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This is _____ key and that is _____ English book.

A. a; a
B. an; an
C. a; an
D. an; a

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