问题补充：
his classmateshis Maths teacher has gone hiking. You can’t find them at school.
A. Both, and
B. Neither, nor
C. either, or
D. Not only, but also
答案：
A. Both, and
B. Neither, nor
C. either, or
(答案→)D. Not only, but also
解析：句意：--不但他的同学，他的数学老师也去徒步旅行了。你在学校找不到他们。A.两者都 B.既不...也不...C. 或者...或者...D. 不但...而且...根据后句可以判断学生和老师都去了，所以不能选BC。both...and...谓语动词要用单三。not only...but also谓语动词要遵循就近原则。句中的谓语动词是has单三不是复数。故选D.
