Hãy chọn câu đúng. Tỉ số x y  của các đoạn thẳng trong hình vẽ, biết rằng các số trên hình cùng đơn vị đo là cm.

A.  7 15

B.  1 7

C.  15 7

D.  1 15

Theo Buy phông, loài cừu không có tính cách nào sau đây?

A. Thân thương

B. Bắt chước

C. Ngu ngốc

D. Sợ sệt

Tính: 5 x 8 - 32

Chất hữu cơ X có công thức phân tử là C₅H₆O₄. Thuỷ phân X bằng dung dịch NaOH dư, thu được một muối và một ancol. Công thức cấu tạo của X có thể là

A. HOOC–CH₂–CH=CH–OOCH

B. HOOC–CH₂–COO–CH=CH₂

C. HOOC–CH=CH–OOC–CH₃

D. HOOC–COO–CH₂–CH=CH₂

Sắp xếp các từ sau thành câu hoàn chỉnh.

 is/ dictionary/ The/ thick.

Đề bài chuyển câu chủ động sang câu bị động

1: We hear the sound of a vioin in her room.

> The sound of the violin is heard in her room.

2: His father praises him when he works hard.

He is praised by his father when he works hard.

3: People speak English all over the world.

English is spoken all over the world.

4: A great artist painted this picture many year ago.

This picture was painted by a great artist many year ago.

5: Somebody told him to do it.

He was told to do it.

6: An unseen hand opened the door.

The door was opened by an unseen hand.

7: The scientists are examming a new spaceship.

A new spaceship is being exammed by th scientists

8: Our friends are making preparations to meet them.

Preparations are being made to meet them by our friends.

Đề bài chuyển câu chủ động sang câu bị động

1: We hear the sound of a vioin in her room.

> The sound of the violin is heard in her room.

2: His father praises him when he works hard.

He is praised by his father when he works hard.

3: People speak English all over the world.

English is spoken all over the world.

4: A great artist painted this picture many year ago.

This picture was painted by a great

5: Somebody told him to do it.

6: An useen hand opened the door.

7: The scientists are examming a new spaceship.

8: Our friends are making preparations to meet them.