题目内容

The surroundings of his house ______ clean now.

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

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Thepublic ______ generous in their contributions to the earthquake victims.

A. is
B. was
C. are
D. has been

Cattle ______ on the hillside.

A. grazes
B. is grazing
C. was grazing
D. were grazing

Her politics ______ neither conservative nor liberal.

A. is
B. are
C. was
D. has been

Measles ______ a kind of infectious illness.

A. is
B. are
C. were
D. have been

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