AutoCAD2018能修改绘图空间背景颜色
A. 对
B. 错
They each ____ a beautiful handkerchief.
A. have
B. has
C. is
D. are
This pair of shoes ____made in Nanjing.
A. is
B. are
C. has been
D. had been
Father went to his doctor for ____about his heart trouble.
A. an advice
B. advice
C. advices
D. the advices
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