问题
选择题
_______ Mary ______ John has been to China before, but they know a lot about it
A.Either, or
B.Both, and
C.Neither, nor
D.Not only, but also
答案
答案:C
从下文but转折可知他们懂得许多关于中国的事,可知他们都没有去过中国。neither···nor表示既不···也不,故选C。Either…or表示要么…要么;both…and 表示两者都;not only…but also表示不但…而且。