单项选择题

As all the people of the world share one earth, industrial countries should be responsible for helping()and ()countries.

A．developed... underdeveloped
B．developing... underdeveloping
C．developing... underdeveloped
D．developed... underdeveloping

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单项选择题
He was obliged to adapt himself()the habits and customs of Byron.

A．with
B．into
C．of
D．to
单项选择题
We didn't know his telephone number, otherwise we ()him.

A．had telephoned
B．must have telephoned
C．would telephone
D．would have telephoned
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