1. intelligent

2. biggest person?

3. walking

4. entertainment

1. Did you work

2. didn.t ... have never worked

3. Did you see

4. had

5. ??

6. doesn't .. works?

7. Did you do

8. watched .. read

9. do you do

10. go

Gấp rưỡi = \(\dfrac{3}{2}\) lần

An có : 30 : (3 + 2) x 3 = 18 (cái)

Bình có : 30 - 18 = 12 (cái)

Rút gọn biểu thức:

\(\dfrac{a-b}{\sqrt{a}-\sqrt{b}}=\dfrac{a+b+2\sqrt{ab}}{\sqrt{a}+\sqrt{b}}\)

1. gets up - is getting up

2. watch - am listening

3. go - am going

4. has - is drinking

5. am reading - is watching

6. lives - lives

7. are playing?

8. get up

9. goes - does

10. is telling?

11. are

12. Does he watch

13. does she do

Sửa : How often.

Where - What

\(4km\text{ }6m>40hm\text{ }5m\)

\(4\text{ tấn }50kg=4050kg\)

\(1299\text{ năm}< 13\text{ thế kỉ}\)

\(20:\left(x+1\right)=2\)

\(x+1=20:2=10\)

\(\Leftrightarrow x=9\)