When we talk about the big cities in China,the first____comes into our mind is BeiJing.
A.one B.city C.that D.which
參考答案:C
解释：虽然when引导了状语丛句，但是后面半句是定于从句，而定于从句的谓语是is，因此comes into my mind是定语，排除A和B，而D错的原因是，the first是序数词，则连接词用that.此外，还有不定代词all, anything等等都用that.