A number of their products ________ put on exhibition.
A. has been
B. is
C. have been
D. are
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When and where to build the new factory ________ yet.
A. has not been decided
B. are not decided
C. has not decided
D. have not decided
70 percent of the people present ________ teachers.
A. is
B. are
C. are coming from
D. belong to
Either you or the headmaster ________ the prizes to these gifted students at the meeting.
A. is handing out
B. are to hand out
C. are handing out
D. is to hand out
Three-fourths of the surface of the earth ________ sea.
A. is
B. are
C. is of
D. has
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