请说明理由.1、More than one studend______ever been to Beijing befo

请说明理由.
1、More than one studend______ever been to Beijing before.
A.has B.have C.had D.having
2、Ten minus six ______ four.
A.are B.be C.is D.am
3、Tom as well as her sisters ______ Chinese in Peking University.
A.are studying B.have studied C.studies D.study
4、My family ______ going on a trip to Shanghai this summer holiday.
A.is B.are C.have D.has
5、Doing exercises and walking ______ good for our bodies.
A.are B.is C.have D.has
6、A student or two ______ the exam.
A.has failed B.have failed C.had failed D.fail

a
c
c
b
a
a
再问： 请说明一下理由
再答： 其实楼下 BrotherWen_054 说的很详细了，只有5,6题不一样，我说下我的观点 5 两个都是运动，但是我觉得是两种不同的运动，不太像例子中的教师，作家指同一个人， 例如 ①The worker and writer has come . 这位工人作家来了。 ②A cart and horse was seen in the distance . 远处能看见有一套马车。 ③Truth and honesty is the best policy . 真诚是最好的策略。 6 a。。。or two 谓语是单数 one or two。。。谓语用复数 另外 4 family 做家庭是单数，指家庭成员是复数

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