___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
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
答
B 就近原则 用单数形式has worked 从后句可以看出，两者都不会
答
B,说两人都还没有解决这道数学题，我不知道他们什么时候能解答出来。A肯定不对，因为谓语动词是has单数。
答
选A，由题意知是“Tom和Jack”的意思
答
B.Neither;nor
答
B.Neither;nor
两者之中任何一个都没有,后跟第三人称单数动词