题目内容

Mathematics ______ the language of science.

A. is
B. has been
C. are
D. have been

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The young ______ the vital forces in our society.

A. is
B. has been
C. are
D. have been

Every man, woman and child ______ some history, enough at least, to survive in the world.

A. knows
B. know
C. is known
D. are known

None of them ______ my friends.

A. is
B. are
C. was
D. has been

Not the whole nation, but the whole Europe , indeed the whole human society ______ to alter its attitude to racial problems.

A. need
B. needs
C. has a need
D. have a need