This pair of shoes ____made in Nanjing.
A. is
B. are
C. has been
D. had been
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Father went to his doctor for ____about his heart trouble.
A. an advice
B. advice
C. advices
D. the advices
The air in big cities _____very dirty by factories.
A. are often made
B. is often made
C. have often made
D. has often made
The Chinese people _____hard-working and brave.
A. are
B. is
C. has been
D. are being
John has two brothers, but either ____out of work now.
A. are
B. is
C. have
D. has