What clean classroom! -Yes , It _________ every day .
| A．cleans | B．cleaning |
| C．is cleaned | D．was cleaned |
________ language you speak, you need to know Chinese if you work in China.
| A．No matter how | B．Whatever |
| C．Wherever | D．no matter what |
—I have never visited the Great Wall before。.
—___ _________
| A．So have I | B．So I have. |
| C．Neither have I. | D．Neither am I. |
The study of English ___________ a very important industry in China.
| A．be regarded as | B．is regarded as |
| C．regard as | D．is learned as |
Her husband _____ for 20 years, but she still lives lonely.
| A．died | B．has died |
| C．has been dead | D．has been died |
Trees can stop the sand _____ towards the rich farmland in the south.
| A．moved | B．to move |
| C．from moving | D．moves |