on July 1, 2006 ___ Qinghai-Tibetrailway began operation, ____ is a symbolic project in China’s West DevelopmentStrategy

The naughty boy spends most of his time playing computer games ______ his lessons.[ ]

We often use computers to ______________.

You can________ the football ________ me,but you mustn’t________ it________ others.

It every day so far this monthI can’t tell you if it tomorrow