－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

1_____there is no rain,farming is difficult or impossible

1_____education is the instruction that occurs when the instructor and students are separated by distance or time,or both

There are many cities _________________ very fast

Are you going to borrow a dictionary or a magazine ? -- ____.

29．__________ when you are on the bus or bike．

Data items are added or deleted from the list only at the top of the______．

Dreams are often an elegant means of highlighting problems ______ in the present or the past.

—Which foreign language are you better at, English or French?—I am sorry I know _______of English and _______of French.

______no air or water, there would be no life in the world.

Some cable services offer 1.5 megabyte or higher access for as ______ as $40 a month, but there are some restrictions regarding service.