int i,*p=&i,**p1=&p;是正确的C说明.
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There ______ a pen and some books on the desk.
A. be
B. being
C. is
D. are
There ______ different opinions on this problem.
A. existed
B. existing
C. to exist
D. exists
There ______ no further business, I declared the meeting closed.
A. was
B. were
C. be
D. being
______ there ______ any new developments in the past 20 years?
A. Have… been
B. Will…be
C. Had…been
D. Would… be