The young _____ the vital forces in our society.[ ]a. is b. has beenc. ared.

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The young _____ the vital forces in our society.[ ]
a. is
b. has been
c. are
d. have been

答案

举一反三

Milk and bread ____ my favorite food every morning. [ ]
A. is
B. are
C. will be
D. was

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Mary is one of the girls who _____ always on time.[ ]
A. is
B. were
C. are
D. was

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I have finished a large part of the book; the rest ____ more difficult. [ ]
A. is　　　　　
B. are　　　　　
C. was　　　　　　　　　
D. were

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A fork and knife ____ on the table. [ ]
A. is
B. are
C. has been
D. have been

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An iron and steel works, with some satellite factories, ____ to be built. [ ]
A. is
B. are
C. was
D. were

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