Question

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

Answer 1

A

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。