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
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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
Getting to other planets or to the moon _____ many problems.
A. involve
B. involves
C. involving
D. to involve
In that country, the rich ______ richer, the poor, poorer.
A. become
B. has become
C. becomes
D. is becoming