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Both the teacher and the students________able to give the an

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Both the teacher and the students________able to give the answer to the problem.In fact.the problem is not difficult.
A.is
B.aye
C.isn't
D.aren't
答案B
分析:主语是both the teacher and the students,不管是both…and…,还是both,还是both of…总是看成复数.另外,从In fact,the problem is not difficult.可以看出应该是肯定概念.(延伸)含有both的句子如果谓语出现否定结构的话,其意义是部分否定,如:Both the teacher and the students aren't able to give the answer to the problem.应该解释为“并不是老师和学生都能给出这问题的答案.”(不能理解为“都不能够”)