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1. I think there _______ (be) fewer trees next year.
2. He              (collect) 300 pictures since 5 years ago.
3. Sam always              (help) his classmates last term.
4. Would you mind _______ (play) games after school?
5. My father came into the bedroom while I _______ (dance).
6. If you want to cross a street, you _______ (wait) for the green light.
7. American fast food seems _______ (be) the most popular in the world.
8. They ______ (eat) a lot of potatoes yesterday, so did I.
9. My mother made me              (clean) my room all by myself yesterday.
10. Please look carefully before you _______ (cross) the street.

1.I think there will be more pollution in the city.（改為否定句）  
I        think there       be more pollution in the city.
2.I have more apples than Lucy.（改為同義句）  
Lucy _______ ________ apples than I.
3.It'll take me half an hour to read the book.（改為一般過去時(shí)的句子）  
It        me half an hour to read the book.
4.Mr. Smith will move to Shanghai in a month.（對(duì)面線部分提問） 
 ___________ ___________ will Mr. Smith move to Shanghai?
5.The Kings lived in London a year ago.（對(duì)畫線部分提問） 
 _________ __________ the Kings live a year ago?

A. don't ; will                  
B. /; won't    
C. will;don't                  
D. won't;/