Either my wife or I ________(am / is / are)going.
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Each of us ________(has / have)got a new story book.
A. has
B. have
Neither of the books ________(is / are)very boring.
A. is
B. are
A series of books __ been sent to the school.
A. has
B. have
A variety of boxes ___ to fall down.
A. is
B. are