bài 1: viết câu thứ 2 mà nghĩa ko đổi 
a, Don't throw rubbish into the water.
-> You shouldn't throw rubbish into the water.
Bài 2:Xắp xếp lại câu
a. use / umbrella / do not / my / him / let !
-> do not let him use my umbrella !
b. Open / book / 26 / . / down / Sit / and / page / your 
-> sit down and  open your book page 26
c. George Washington / first / president / usa / was / the / of / the 
-> George Washington was the first president of the usa 
d. fought / He /battles / against / the british / many 
-> He fought against many  the british battles
e. He / president / united states of america / 1789 / becam the / the 
-> He  becam the president of  united states of america in 1789