Exercise 2: Put the verbs in the brackets in the correct form.

1. If I had a bike , i would ride it every day .

2. George would have gone on a trip to Chicago if he had had a time .

3. Marcella didn’t come to class yesterday. She had an accident .

4. John didn’t do his homework , so the teacher became very angry . John must do his homework .

5. Sharon was suppoted to be here at nine o'clock . She fogot about our meeting .

6. Where do you think Jane is today ? She is sleeping late .

8. Robert arrived without his book . He lost it .

9. Thomas received a warning for speeding . He drove so fast .

10. Henry’s car stopped on the highway . It ran out of gas .

Exercise 3: Rewrite the following sentences, using the modal verb in the bracket.

1. It was a mistake not to bring your umbrella.

⇒ You should have brought your umbrella .

2. I can imagine how worried Tom’s father was .

⇒ Tom's father must have been very worried .

3. It is possible that one of the men died on the mountain .

⇒ One of the men may have died on the mountain .

4. It wasn’t necessary for you to do all this work .

⇒ You needn't have done all this work .

5. It was a mistake for you to buy that house .

⇒ You shouldn't have bought that house .

6. I don’t think Sally enjoyed her holiday .

⇒ Sally can't have enjoyed her holiday .

7. Perhaps Alan didn’t mean what he said .

⇒ Alan mightn't have meant what he said .

8. It was the driver’s fault . He didn’t stop at the red light .

⇒ It was the driver 's fault . He should have stopped at the red light .

10. Perhaps he spent all his money when he was young .

⇒ He might have sent all his money when he was young .

25% của 625 là :

625 : 100 x 25 = 156,25

đáp số : ....

Gọi số có 3 chữ số đã cho là abc. 

Nếu ta viết thêm chữ số 3 vào bên trái số abc thì ta sẽ được số 3abc.

Khi đó abc sẽ tăng thêm : 3abc - abc = 3000 (đơn vị)

Vậy khi ta viết thêm chữ số 3 vào bên trái một số có 3 chữ số thì số đó sẽ tăng thêm 3000 đơn vị.

7 cành hoa

Em lớp 5 nên cx bó tay lun . Sorry nha

Cắt nửa miếng thịt => Nửa miếng thịt cân nặng : 22 : 2 = 11 kg

Cắt nửa miếng thịt thành 3 phần=> 1 miếng nhỏ cân nặng : 11 : 3 = 3,667 kg

Bạn duyệt đúng mik nha

Số tuổi của cha là 36 tuổi . Mình chắc chắn lun đó

67% của 100 là =67

vì 100 : 100*67=67

Vậy thể tích cũng = 4/5 chiều cao của bể

Thể tích bể là :

48 : 4/5 = 60 ( dm³ )

Đổi : 0,5 m = 5 dm ; 0,3 m = 3 dm

Chiều cao của bể là :

60 : 5 : 3 = 4 ( dm )

Mk đầu tiên nha