When you go by train, please see to it you take an express, that stops only at big stations.
A. that, one
B. /, the one
C. that, it
D. /, it
网友回答
(答案→)A. that, one
B. /, the one
C. that, it
D. /, it
解析：see to注意，负责。see to后接宾语从句加it再加that引导的宾语从句，构成see to it that; one做同位语代替an express，后接定语从句。