单项选择题

Writing stories and articles ______ what she enjoys most.

A. is
B. have been
C. was
D. were
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单项选择题
An iron and steel works, with some satellite factories ______ to be built here.
A. is
B. are
C. was
D. were
单项选择题
All ______ present and all ______, going on well, our monitor said．
A．is：is
B．are；are
C．are；is
D．is；are
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