- I saw a man jump through the window 5 minutes ago.

- We haven't got any news to tell you.

- It's impossible for me  to be there before 8.00

- They invited me to stay in Florida with them.

        S nửa hình tròn là 6 x 3,14 :2 = 9,42 

( nếu từ tâm của hình tròn dọc xuống thì ra bán kính hay là chiều cao của hình thang )

 Chiều cao hình thang là 6 : 2 = 3

S hình thang là ( 6 x 2 + 6 ) x 3 : 2 = 27

S phần gạch chéo là 27 - 9,42 = 17,58

                                            đáp số 17,58

- 1. aren't -> weren't

- 2. answer -> answered ; call -> called

- 3. does -> did 

- 4. go -> went ; every -> last

- 5. wants -> wanted

- 1. am -> was

- 2. are -> were

- 3. isn't -> wasn't

- 4. Are -> Were ; are -> were

- 5. are -> were

- 4. Why didn't he go to school last week?

- 5. What is Mrs.White doing at the moment?

- 3. It was very cold last night.