3. were 

4. will remember

5. received

6. were building/ was/ haven't finished

7. would go

8. searched/ lost

9. are you doing/ am packing/ am going to catch

10. have returned

11. arrive 

12. will finish 

13. see

14. am going/ is raining/ stopped

15. forget

16. will be

17. has been 

\(a,\Leftrightarrow3m-2+m-2=2\\ \Leftrightarrow m=\dfrac{3}{2}\\ b,\text{PT giao Ox: }y=0\Leftrightarrow x=\dfrac{2-m}{3m-2}\Leftrightarrow OA=\left|\dfrac{m-2}{3m-2}\right|\\ \text{PT giao Oy: }x=0\Leftrightarrow y=m-2\Leftrightarrow OB=\left|m-2\right|\\ \Leftrightarrow S_{AOB}=\dfrac{1}{2}OA\cdot OB=\dfrac{1}{2}\cdot\left|\dfrac{m-2}{3m-2}\cdot\left(m-2\right)\right|=\dfrac{1}{2}\\ \Leftrightarrow\dfrac{\left(m-2\right)^2}{\left|3m-2\right|}=1\\ \Leftrightarrow\left|3m-2\right|=\left(m-2\right)^2\Leftrightarrow\left[{}\begin{matrix}3m-2=m^2-4m+4\left(m\ge\dfrac{2}{3}\right)\\2-3m=m^2-4m+4\left(m< \dfrac{2}{3}\right)\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}m^2-7m+6=0\left(m\ge\dfrac{2}{3}\right)\\m^2-m+2=0\left(vn\right)\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}m=1\\m=6\end{matrix}\right.\)

a: Thay x=1 và y=2 vào (d), ta được:

3m-2+m-2=2

=>4m=6

hay m=3/2

to be 

saying 

crying 

to answer

to find

traveling

to go

to quit

celebration

to know 

making

finishing 

to get 

paiting

to lock

informing

to visit

to exercise

talking

to smoke

to be 

to stop

recycling 

studying

to move 

to help

not to be 

??????/

13 B

14 B

15 C

1 It took him 2 hours to cook dinner

2 He has learnt English since he was 6 years old

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