CD : (64 + 16) : 2 = 40 m

CR : 40 - 16 = 24 m

Phần trăm đát trồng cây :

100% - 30% = 70%

DT đất :

24 x 40 = 960 m2

DT trồng cây :

960 : 100 x 70 = 672 m2

1. what about buying energy-saving bulbs?

2. let's use electricity economycally?

3. why don't you ask her yourself?

4. what about organizing a charity event to raise money?

5.i suggest unused cothes should be collectedfor the victims

6. what not take the garbage to recycling centers? said the local authorities

7. shall we go to the enghish speaking club? anderew said

8. " why don't you put an adveritisementin this local newspaper? they said to me.

9. "why don' t you repair electric fan, nam 'Ba asked.

10. ''let not't tell anyone until we are certain that are report is true'' said tom.

1. " my sister cooks rice every day." the boy said.

2. " don't throw this bottle away." Mr Cuong said to the boy.

3. " can you buy me an English exersice book, Nam." Thao asked.

4. " he will not travel to Hue by car tomorrow." Linh said to her brother.

5. " is their family having lunch in the dinning room now." Hai asked me.

6. " where have you worked since 2017 ? " Lien asked Hoa.

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