1 about - in

2 In - to

3 from - of - in

4 in - at - during

5 in - on

6 about

7 from

8 as

9 by - in - in

10 to - in

Bài 6:

Áp dụng tính chất của dãy tỉ số bằng nhau, ta được:

\(\dfrac{a}{41}=\dfrac{b}{29}=\dfrac{c}{30}=\dfrac{a+b}{41+29}=\dfrac{700}{70}=10\)

Do đó: a=410; b=290; c=300

dạ ko ạ, làm dạng 1 và 2 ạ

b6 fashion - long hours - contacted  - clients - grades 

b5 c làm ở dưới r í

1..at

2..orange juice please

3..when

4...rides

5..for two days

6..are wearing

7..at

8..excited

9..skipping

10..have

1.for

2.orange juice

3.when

4. rides

5.by bus

6. wear

7.at

8.excited

9.skipping

10.go

1. for

2. Orange juice please

3. when

4. rides

5. By bus

6. wear

7. at

8. excited

9. skipping

10. go

Bài 4 nào bài 8 đâu em 

là sao

41.c

42.c

43.c

44.d

45.b

46.b

Bài 4:

b) \(7x=4y\Rightarrow\dfrac{x}{4}=\dfrac{y}{7}\)

Áp dụng t/c dtsbn:

\(\dfrac{x}{4}=\dfrac{y}{7}=\dfrac{y-x}{4-7}=\dfrac{24}{-3}=-8\)

\(\Rightarrow\left\{{}\begin{matrix}x=\left(-3\right).4=-12\\y=\left(-3\right).7=-28\end{matrix}\right.\)

c) Áp dụng t/c dtsbn:

\(\dfrac{x}{3}=\dfrac{y}{4}=\dfrac{2x}{6}=\dfrac{3y}{12}=\dfrac{2x-3y}{6-12}=\dfrac{24}{-6}=-4\)

\(\Rightarrow\left\{{}\begin{matrix}x=\left(-4\right).3=-12\\y=\left(-4\right).4=-16\end{matrix}\right.\)

Bài 3:

a: Ta có: \(\dfrac{2.5}{7.5}=\dfrac{x}{\dfrac{3}{5}}\)

\(\Leftrightarrow\dfrac{x}{\dfrac{3}{5}}=\dfrac{1}{3}\)

hay \(x=\dfrac{1}{5}\)

b: Ta có: \(\dfrac{5}{6}:x=\dfrac{20}{3}\)

\(\Leftrightarrow x=\dfrac{5}{6}:\dfrac{20}{3}=\dfrac{15}{120}=\dfrac{1}{8}\)

s khó v?

1. party

2. go

3. enjoyed

4. join

5. watched

6. went/ went /enjoyed

7. ate

8. ate/ played

9. come

10. 

11. festival

12. go/ countryside

13. on/ beach

14. at

15. in