二、单项填空(共20小题;每小题1分,满分20分)
21. On the door of the train there is sign reading:“Please mind gap.”
A. a ; the B. the ; the C./;/ D. a ; /
22. Don’t leave the water while you brush your teeth.
A. run B. running C. being run D. to run
21. On the door of the train there is sign reading:“Please mind gap.”
A. a ; the B. the ; the C./;/ D. a ; /
22. Don’t leave the water while you brush your teeth.
A. run B. running C. being run D. to run