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( )1.Mary together with his sisters,___________Chinese in Ch

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( )1.Mary together with his sisters,___________Chinese in China.
A.study B.have studied C.studies D.are studying
( )2.We all agree that a pair of shoes_______a very nice present.
A.are B.is C.were D.have
( )3.Both Lily and Lucy_______been to Beinjing twice.
A.have B.has B.are D.do
( )4.They_______to visit the Summer Palace if it's fine tomorrow.
A.have gone B.went C.go D.will go
( )5.Physics_______difficult________for us.
A.is a;topic B.are;subjects C.are;topics D.is a;subject
1.C 主语是Mary,with表示伴随,所以谓语用第三人称单数.
2.B 主语形式为复数,但意义为单数,谓语用单数.
3.A both强调两个人,所以谓语用复数.
4.D 主语是复数they,谓语也用复数.
5.D 主语形式为复数,但意义是单数,physics指的是物理这一门课,所以谓语用单数.