umbrella is              useful object for people, especially on rainy days.

A. An; a
B. A; a
C. The; an
D. A; an
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科目：初中英語 來源：期末題 題型：單選題

             umbrella is              useful object for people, especially on rainy days.
[     ]
A. An; a
B. A; a
C. The; an
D. A; an

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