In my opinion, some of the news _____ unbelievable.
A. are
B. is
C. has been
D. have been
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When ______ the United Nations founded?
A. is
B. are
C. was
D. were
Every possible means _____ .
A. has tried
B. has been tried
C. was tried
D. were tried
What she says and does _____ nothing to do with me.
A. was
B. were
C. has
D. have
There _____ a dictionary and several books on the desk.
A. are
B. must
C. have been
D. is