I

1 A

2 B

3 D

4 D

5 D

II

1 D

2 C

3 B

4 D

5 C

I

1 A

2 B

3 D

4 D

5 D

II

1 D

2 C

3 B

4 D

5 C

I.

1. Are sent

2. Are given

3. Are collected

4. Aren't did

5. Are sold

6. Are taught

7. Is ask

8. Are told

9. Aren't kept

10. Are caught

Chúc bạn học tốt!! ^^

II.

1. Are sang

2. Am bit

3. Is stole

4. Is - given

5. Aren't made

6. Is cooked

7. Aren't sent

8. Were told

9. Was drank

10. Is destroyed

Chúc bạn học tốt!! ^^

1 D

2 C

3 C

4 A

5 B

6 D

7 B

8 C

9 C

10 B

11 D

12 D

13 A

14 A

15 C

16 A

17 C

18 B

19 D

20 A

1D

2C

3A

4A

5C

6B

7B

1 was sung

2 was bitten

3 was stolen

4 Was - given

5 weren't made

6 was cooked

7 weren't sent

8 were told

9 is drunk

10 was destroyed

1, was sung

2,was bitten

3,was stolen

4,was -Given

5, Weren't made

6,was cooked

7,weren't sent

8, were told

9,was drunk

10, was destroyed

Câu 1: Chọn C.

Câu 2: Chọn D.

Câu 3: Chọn A.

Câu 4: Chọn A.

Câu 5: Chọn D (x=13/2).

Câu 6: Chọn A.

Câu 7: Chọn B.

Câu 8: Chọn D.

Câu 9: Chọn a.

Câu 10: Chọn d.

Gọi vận tốc lúc đi là x(km/h)

(Điều kiện: x>0)

Vận tốc lúc về là x+10(km/h)

Thời gian ô tô đi từ A đến B là \(\frac{200}{x}\) (giờ)

Thời gian ô tô đi từ B về A là \(\frac{200}{x+10}\) (giờ)

Thời gian đi nhiều hơn thời gian về là 1 giờ nên ta có:

\(\frac{200}{x}-\frac{200}{x+10}=1\)

=>\(\frac{200x+2000-200x}{x\left(x+10\right)}=1\)

=>x(x+10)=2000

=>\(x^2+10x-2000=0\)

=>(x+50)(x-40)=0

=>x=-50(loại) hoặc x=40(nhận)

Vậy: Vận tốc lúc đi là 40km/h

Câu nèo thé ?_?

Câu nào thế bạn????