Either of the books ________ mine.
A. is belong to
B. is of
C. is
D. were
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John said that she ________ lunch when I called her.
A. is having
B. will have
C. was having
D. would have
The singer and dancer ________ our party this evening.
A. is to attend
B. are going to attend
C. is about to attend
D. were to attend
One of the things she wrote about ________ life on a small farm at the beginning of the century.
A. is
B. were
C. are
D. was
TCP协议成为（）
A. 网际协议
B. NetWork内部协议
C. 传输控制协议
D. 中转控制协议
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