—Why is the classroom so dirty?  
—Sorry , sir. It     ____ yesterday. We forgot to do it.

—I want to be a Chinese teacher when I grow up.   
—That's great. Chinese teachers     ____ in China and   some foreign countries.

After the hero's story     ____ on CCTV , many people  are learning from him.

Computers are very useful. For example,they can_________sending emails.  

This kind of books _____ well and _____ out in this bookshop.  

請把下面句子改成寫被動語態(tài)的句子。
1. People designed the first computer in the 1940s.  
    __________________________________
2. Computers solve a lot of problems for us.  
    __________________________________
3. Most schools in China teach Computer.   
    _______________________________     
4. People order a lot of things on the Internet now.   
    __________________________________
5. At present people use computers as a tool. 
    _________________________________
6. A computer stores much information.   
    _______________________________
7. People didn't use computers widely 50 years ago. 
     _________________________________
8. I didn't know who designed the first computer.  
    _________________________________
9. Everyday people use computers.
    _____________________________________
10. The school bought many computers yesterday.
    ______________________________________

—Will you come to the dinner party??
—I won't come unless Jenny _________.

The International Horticultural Exposition (園藝博覽會) ________ in Shenyang in May, 2006. Thousands of people have visited it.

Both English and French ________ in Canada.