单项选择题
A. It causes collisions of cars. B. It increases the risk of road accidents. C. It causes passengers’ complaints. D. It leads to slowness of drivers’ attention.
A. think twice B. have a severe impact on the country C. listen to the Voice of America D. stop playing political games
A. Give a class for Don while he’s absent. B. Give Professor Webster the key to Don’s office. C. Put the next assignment on the board. D. Buy a lunch for Prof. Webster.