B1
1. No one in my class is taller than Hung
=>Hung is............................................
2.Jack went to London last summer vacation.( make questions)
=>................................................................
3.The game show was boring,but my mother stayed up late to watch it till the end.
=> Although the...........................................................................
4.I learn English.I want to go abroad.
=>I want..........................................................
5.This is their car.
=>this car.............................................
B2 
1.You are not allowed  to play football in the street.
=> Don't..................................................................
2.I have a red pen.
=> This is.............................
3.The apartment is so comfortable.
=> What...................................................................!
4.My brother is a good student.
=>My brother studies............................................................
5.No one in our school is stronger than me.
=> I.......................................................
B3
Earth Day is (1)_______birthday! Just like a birthday is a special day to celebrate a person,Earth Day is a special day that celebrates the Earth.It (2)________a day to remember to take care of our planet.
Earth Day was born (3)________April 22,1970, in San Francisco,California. It is now the largest,most celebrates environmental event worldwide.Every year, many countries around the world join together in the celebration of Earth Day on April 22nd. On Earth Day, people celebrate by doing things that help (4)________the environment. Some things people do to help the Earth are: turn (5)__________the lights to conserve energy, plant trees, recycle, and pick up garbage in their communities.
You don't have to wait for Earth Day though, you can help the environment every day!
   1. A.a                  B.an                        C.the                  D.x
    2.A.am               B.is                         C.are                  D.be
    3.A.at                 B.in                          C.on                  D.of
    4.A.protected     B.to protected         C.protect            D.to protect
    5.A.on                B.in                         C.at                    D.of
B4: TÌM LỖI SAI VÀ SỬA LẠI
1.If we do planting trees,there will be more floods every year.
              A        B                             C                    D
2.Lan is taller than she sister.
            A    B      C     D 
B5
1. let's write about the three Rs?
Why__________________________________________________?
2. Plastic bags are cheaper than reusable bags
Reusable bags are_______________________________________________
3. Remember to turn the tap off when you are brushing your teeth.
Don't________________________________________________