When you go by train, make sure you take an express, ____ stops only at big stations.

A．one   B．one that   C．that D．what

When you go by train, make sure you take an express, ____ stops only at big stations.

1. A.
   one
2. B.
   one that
3. C.
   that
4. D.
   what

When you go by train, make sure you take an express, ___________stops only at big stations.

A．one B．one that   C．that D．what

When you go by train, make sure you take an express,          stops only at big stations.
       A．one                    B．one that              C．that                    D．what

When you go by train, make sure you take an express,______stops only at big stations.
A.one  　 B．one that  　　 C．that  　　　D．what