—I telephoned him twice and I couldn’t get through to him．
—The line might have been out of order, _________?
| A．don’t you | B．do you |
| C．wasn’t it | D．hadn’t it |
Modern forms of transportation and communication have done much to ______ the isolation（隔离）of life in Alaska.
| A．break down | B．break out |
| C．break into | D．break through |
If you don’t try your best to learn all subjects, you will ___ behind.
| A．stay | B．leave | C．fall | D．remain |
Entering the room,I found Mary____ at the desk and____ a letter.
| A．seated;wrote | B．sitting;written |
| C．seating;writing | D．seated;writing |
——Ms Lin looks rather a kind lady.
——But in fact she is cold and hard on us. You ____ believe it!
| A．shouldn’t | B．wouldn’t | C．mustn’t | D．needn’t |
---How did your students express their thanks to you on Teachers’ Day?
---A gift together with many flowers _______ sent to me .
| A．is | B．are | C．was | D．were |