Qinghai-TibetRailway(青藏铁路) wascomple­ted last year. It is the __________ railway that connects Tibet with theother parts of China.

My father used to drive to work, but he is used to ______ now.

对下列句子中画线的词的解释，不正确的一项是（ ）

While you are traveling abroad, attention should be paid to _______ you _______.

I couldn’t stand the of not being able to help when my best friend was in trouble.