I. Chọn đáp án đúng 1. John...playing the piano ten years ago.

A. begin B. begins C. was beginning D. began

2. How much does it...?

A. have B. take C. cost S. costs

3. How much do they...?

A. costing B. to cost C. costs D. cost

4. I...difficulties in solving problem. I didn't do anything.

A. had B. have C. am having D. to have

5. My mother always drives...

A. careful B. carefully C. slow D/ fastest

6. You ought to...to the dentist

A. going B. to go C. go D. will go

II. Chia thì phù hợp

1. Cathy... (to be) born in England

2. She... (start) painting in 1980

3....she usually...(work) ten hours a day?

4. He is an awful driver. He never...(stop) the car smoothly

5. When Peter was young, he...(like) to drink coffee

6. My younger brother...(study) his lesson at the moment

I. Phát hiện lỗi sai trong những câu sau rồi sửa:

1. The Rè River start in China.

2. How lenght are you going to stay in Viet Nam?

3. Tokyo has a populated of 12 million.

II. Hãy dùng từ gợi ý để hoàn chỉnh câu sau:

1. my aunt/ have/ garden/ small and/ grow/ few flowers.

2. world/ need/ more food/ because/ more people.

3. we/ do/ many/ bad/ thing/ environment.

4. when/ not need/ light/ you/ switch/ it.

Giúp mình với, mình cần gấp !

Biết: Am//Cn

Biết: xy// NP

Chững minh: góc NMP + góc N + góc P = 180 độ

Biết xy//NP

Chứng minh: góc NMP + góc N + góc P = 180 độ

Biết Am//Cn

Trong mặt phẳng tọa độ Oxy, cho đường thẳng  d : y = m x + 5.

b) Tìm tất cả các giá trị của m để đường thẳng (d) cắt parabol  P : y = x 2  tại hai điểm phân biệt có hoành độ lần lượt là  x 1 ,   x 2  (với  x 1 < x 2 ) sao cho  x 1 > x 2 .