题目内容

6.-Is this ( ) apple tree?-No, it is ( ) orange tree.

A. an/the
B. the/the
C. an/an
D. the/an

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That was the second time I ( ) abroad.

A. have been
B. had been
C. was
D. were

8. His plane is due at 10 in Paris. Look, ( ) plane is now at ( ) airport.

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

9. When Tom was a little boy, he already knew the sun ( ) the center of the solar system.

A. was
B. is
C. will be
D. are

10. She told me her name only after I ( ) her twice.

A. have asked
B. asked
C. had asked
D. have been asked