I

1c

2b

3c

4c

5c

6d

7b

8c

II

28b

29c

30d

31d

III

1. Because a robot cannot think or do things alone

2. They can help us save a lot of time and work

3. They are expensive

4. No, they aren't

IV

1. I didn't go to school yesterday because I had a bad cold

2. Although Lan can sing very wel, she can't play the piano

3. If we don't use the car all the time, we won't make the air dirty

Bài 1

1.C

2.b

3.C

4.C

5.C

6.d

7.b

8.C

Bài 2

28.b

29.C

30.d

31.d

BàI 3

1. Because a robot cannot think or do things alone

2. They can help us save a lot of time and work

3. They are expensive

4. No, they aren't

Bài 4

1. I didn't go to school yesterday because I had a bad cold

2. Although Lan can sing very wel, she can't play the piano

3. If we don't use the car all the time, we won't make the air dirty

Hãy giúp mọi người biết câu trả lời này thế nào?

chúc bn học tốt !

xin hãy nhất !