-How many students are there in your school?-_______ students, I think.[ ]A.

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-How many students are there in your school?
-_______ students, I think.[     ]
A.Thousand of
B.Three thousands
C.Three thousand
D.Three thousands of

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举一反三

Li Ming will take part in the boys" _______.[ ]
A.800-meter race
B.800-meter races
C.800 meter race
D.800-meter-races

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There were ______ animals in the forest many years ago. [ ]
A. thousand of
B. thousands of
C. three thousand of
D. three thousands of

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—Can you say the number 4868 in English?
—Sure!It’s______. [ ]
A. four thousand and eight hundred and sixty-eight
B. four thousand eight hundred and sixty eight
C. four thousand eight hundred and sixty-eight
D. four thousand and eight hundred sixty-eight

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There are ______days in a week. [ ]

A. the seven
B. seven
C. seventh
D. the seventh

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There are ______ workers in this factory.         [     ]
A. four hundreds
B. hundreds of
C. four hundreds of
D. hundred of

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