We arranged to meet at 8:00 , but she never__________.

Remember not to telephone me after 7：30 pm, for I ____ the students in the classroom then.

(2013·安徽合肥二模)—The cars give off a great deal of waste gas in the streets.—Yes. But I'm sure something will be done to ________ air pollution.

30. – Why does the boss look worded?– Tom left the company a month ago and his work unfinished ever since.

All the preparations for the task ______, and we're ready to start.