单项选择题

Many incurable diseases such as cancer and prostatitis become commoner () we get older.

A.if
B.as
C.for
D.before

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单项选择题

() those bad habits, he would not have got liver cancer.

A.Was he giving up
B.Did he give up
C.If he gave up
D.Had he given up

单项选择题

What the new comers are learning () the standard Chinese language.

A.were
B.are
C.has
D.is

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