_________ my students are good at English.[ ]A. The number of B. A number of

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_________ my students are good at English.[ ]
A. The number of
B. A number of
C. a lots of

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举一反三

The little boy wrote _______ "U" and ________ "N" on the wall.[ ]
A. a; an
B. an; a
C. a; a

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_____ increasing population is ______ environment problem in many countries.[ ]
A. The; an
B. An; the
C. An; an

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Beijing has got _____ population of more than 13.8 million. [ ]
A. the
B. a
C. an
D. /

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He is __________ honest boy, so we all like him.[ ]
A. a
B. an
C. the

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—Did that sportsman win ____ gold medal at ____Athens Olympics?
—Yes, he did.[     ]
A. a; an
B. a; the
C. a; /
D. /; the

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