Twenty dollars ________（is / are）too expensive for the book.
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Our class________（is / are）having lunch now.
A. is
B. are
There ________（is / are）a pen and some books on the desk.
A. is
B. are
Not only the teacher but also his students ________（like / likes）playing football.
A. like
B. likes
More than one student ________（has / have）ever been to Beijing
A. has
B. have
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