单项选择题

He _____ his homework when his mother came back yesterday evening.

A.was doing
B.is doing
C.did
D.does
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单项选择题
In what ways are elephants like the human beings?()

A.They never forget great sadness or great happiness.
B.They live in families of females.
C.They live together for a long time.
D.They have daughters, mothers and grandmothers.

单项选择题
What is the lesson for American business?()

A.Many women still pay more attention to their homes.
B.Nowadays many women have other interests besides their homes.
C.Many women have no interests.
D.Many women don’t care of their homes any longer.

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