He hasn’t found a job yet because he had no ________ to anybody who could help him.

A．approach

B．application

C．access

D．approval

读“我国部分铁路分布图”，回答下列问题． 

（1）填出图中字母所代表的铁路枢纽各称．

A______   B______   C______

D______   E______   F______

（2）填出图中数字所代表的铁路线名称．

①______ 线   ②______ 线   ③______ 线

④______ 线   ⑤______ 线   ⑥______ 线

（3）青藏铁路线已铺轨竣工，该铁路起止点分别是______和______．