Only the earth has environment with air.[ ]A. aB. anC. theD. /

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Only the earth has environment with air.[ ]
A. a
B. an
C. the
D. /

答案

举一反三

When was  ___  umbrella  __    ,do you know?   [     ]
A. ／, invented
B. the, invented
C.  an, discovered

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I have met ______ boy in the street.[     ]
A. a eight-year-old
B. an eight-years-old
C. an eight-year-old
D. an eight years old

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Our Chinese teacher told us____interesting story and         story was about Thomas Edison.    [     ]
A. an,a
B. the, the
C. a, the
D. an, the

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I live in            old city of" Mexico.   [     ]
A. a
B. an
C. the
D. one

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English is______ international language.    [     ]
A. a
B. an
C. ／
D. the

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