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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______ 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
The world longest bridge across the Bay is now ______ construction.
A．at
B．under
C．in
D．with
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