Trên đề "Her son" là tính từ sở hữu thì phải có phẩy chứ. 

1. “I am woking for a big company now,” Long said.

`->` Long said that he was working for a big company then. 

2. “Will you buy the house?” Lan said to me.

`->` Lan asked me if I would buy the house. 

3. Long studies very hars, so he gets high marks. 

`->` If he didn't study hard, he wouldn't get high marks.

4. The government should give men and women equal pay for equal work.

`->` Men and women should be given equal pay for equal work by the government.

5. No mountain in the world is higher than Mount Everest.

`->` Mount Everest is the highest mountain in the world. 

6. The woman is a teacher at our school. Her son went on a picnic with us last weekend.

`->` The woman, whose son went on a picnic with us last weekend, is a teacher at our school

=))) Không đáng kể.

#h24cfs_592 "Không có ý gì" thế đằng trước là gì vậy? Bị vô tri cái nói vô duyên vậy hả? 

\(k)\left(-2\right)^3\cdot\dfrac{-1}{24}+\left(\dfrac{4}{5}-1,2\right):\dfrac{2}{15}\\ =-8\cdot\dfrac{-1}{24}+\left(\dfrac{4}{5}-\dfrac{6}{5}\right)\cdot\dfrac{15}{2}\\ =\dfrac{\left(-8\right)\cdot\left(-1\right)}{24}+\dfrac{-2}{5}\cdot\dfrac{15}{2}\\ =\dfrac{1}{3}+\left(-3\right)\\ =\dfrac{1}{3}-\dfrac{9}{3}\\ =-\dfrac{8}{3}\)

\(l)25\%-1\dfrac{1}{2}-\left(-\dfrac{1}{2}\right)^2+0,25:\dfrac{1}{12}\\ =\dfrac{1}{4}-\dfrac{3}{2}-\dfrac{1}{4}+\dfrac{1}{4}\cdot\dfrac{12}{1}\\ =\dfrac{1}{4}-\dfrac{6}{4}-\dfrac{1}{4}+3\\ =-\dfrac{3}{2}+\dfrac{6}{2}\\ =\dfrac{3}{2}\)

\(m)\left(\dfrac{-2}{5}\right)^2+\dfrac{1}{2}\cdot\left(4,5-2\right)-50\%\\ =\dfrac{4}{25}+\dfrac{1}{2}\cdot\left(\dfrac{9}{2}-\dfrac{4}{2}\right)-\dfrac{1}{2}\\ =\dfrac{4}{25}+\dfrac{5}{4}-\dfrac{1}{2}\\ =\dfrac{16}{100}+\dfrac{125}{100}-\dfrac{50}{100}\\ =\dfrac{91}{100}.\)

`3/2 -x = 4/9`

`x = 3/2 - 4/9`

`x= 19/18`.

`14.` Chọn A. /d/, còn lại là /t/

`15.` Chọn D. /d/, còn lại là /t/

`16.` Chọn D. /e/, còn lại là /i:/

`17.` Chọn B. /a:/, còn lại lại là /ae/.

IX. Write conditional sentences type 2, using the cues given.

1. What/ happen/ if/ water pollution/ stop?

`->` What would happen if water pollution stopped?

2. We/ be/ happy/ if/ air pollution/ the world/ be/ a/ better place?

`->` Would we be happy if air pollution in the world were a better place?

3. If/ there/ be/ no more pollution/ the world/ be/ a better place?

`->` Would the world would be a better place if there were no more pollution?

4. If/I/ be/ you/I/ take/ these bottles/ the bottle bank.

`->` If I were you, I would take these bottles to the bottle bank.

5. If/ people/ not really care/ the environment/ they/ not try/ save it.

`->`If people didn't really care the environmet, they wounld not try to save it.

6. The river/ not be/ so polluted/ if/ factories/ not dump/ waste/ it.

`->` The river wouldn't be so polluted if factories didn't dump waste into it.

7. We/ be/ less worried/ if/ oil spills/ not have/ such destructive effects.

`->` We would be less worrried if oild spills didn't have such destructive effects.

_

`-` Công thức: If + S + `V_{QKĐ}`, S + would/could + `V_1`

`*` trong đó: `V_{QKĐ}` gồm:

`+` didn't + `V_1` 

`+` `V_{2//ed}`

`+` were. 

VII. Complete the sentences with the verbs in brackets. Use conditional sentences type 1.

1. gets

2. will not be

3. keep

4. will help

5. don't stop, will become

6. recycle - will not produce

7. will have - dump

8. continues - will rise

9. keeps - will not be

10. will threaten - don't cut down

_ 

`-` Công thức: If + S + `V_{HTĐ}`, S + will/can + `V_1`

`*` trong đó: `V_{HTĐ}` gồm:

`+` don't/doesn't + `V_1` 

`+` `V_{1//s//es}`

`+` am/is/are.