— Excuse me. Could you tell me how I can get to Foster City Library?
— Sorry, I don’t know. This is my        time here.

Qinghai-Tibet Railway(青藏铁路) was comple­ted last year. It is the __________ railway that connects Tibet with the other parts of China.

Qinghai-Tibet Railway（青藏铁路）was completed last year．It is the               railway that connects Tibet with the other parts of China．

A．first                     B．second                 C．third                      D．fourth

--I hear your pen friend is visiting Lianyungang again．Is it the ________ time for him?

--Yes，and he will come for a third time next spring．

A．first         B．second         C．third         D．fourth