6. An accident ______ ______ (watch, happen) when I walked across the street .

7. A lot of things _______ (do)by people to save the little girl now.

8. Strange things ______(take) place every year.

9. The food ______ (smell) really delicious. . 

10. A talk on Chinese history _______ (give) in the school hall sooner or later. 

三、单项选择：

(    ) 1. ----Have you returned the book to the library ____?          

----Yes, I have ____ returned it.

A. yet, yet                    B. already, already        C. already, yet              D. yet, already

(    ) 2. ----____ have you lived here?       ----Since last year.

A. How long               B. How often                      C. How soon               D. How far

(    ) 3. He has been away ____.

A. since a month          B. for a month              C. for a month ago       D. in a month

(    ) 4. It was ____ difficult work ____ nobody can do it well.

A. so, that                    B. such a, that              C. such, that               D. so a, thatliuxuepaper.com