How do you usually go to school —I usually go to school ______.

I’m sorry I went out for a smoke. Iwas very tired.—There’s no ______ for this while youare at work.

By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _______appeared a rare rainbow soon.

What are you reading, Tom? — I’m not really reading, just _____ the pages. [ ]

My father is a good driver. He has a good ________of direction(方向). He never _______in the city.