Trains with the first letter D or Z can run __________a speed of more than 200 kilometers an hour when it travels __________ thedesert.

The son tried to persuade his father _________ smoking.

He had ________me not to play games on the Internet again, but hardly could he get rid of them.

The number of smokers, ________ is reported, has dropped by 17 percent in just one year.．

30．一Cydia，what did you hear our teacher said just now?一Every boy and every girl as well as the teacher who___to lead the group____asked to be at the school gate before 6：30 in the morning