___Tom___Jack has worked out the maths problem.I don't know when they will work it out.

问题描述:

___Tom___Jack has worked out the maths problem.I don't know when they will work it out.
如题.选项:A.Both;and B.Neither;nor C.Either;or D.Not only;but also

B.Neither;nor
两者之中任何一个都没有,后跟第三人称单数动词