2. Write S for simple sentences and C for compound sentences.

(Viết S cho câu đơn và C cho câu ghép)

___ 1. Teenagers are often very active and talkative.

___ 2. He often chats with his friends on Facebook Messenger.

___ 3. She is a smart student, and she is an active member of our club.

___ 4. My friends and I joined a sports competition last year.

___ 5. He is a club member, but he never participates in any of the activities.

4. Combine the two sentences to make compound sentences, using the words from the box.

(Kết hợp hai câu để tạo câu ghép, sử dụng các từ trong hộp)

or          therefore          so

but        otherwise

1. Phong has to study harder. He may fail the exam.

2. She is very sensitive. Don’t comment on her new hairstyle.

3. Mi wants to have more friends. She doesn’t connect well with others.

4. Students can work in groups. Students can work in pairs.

5. My friend likes showing off her new things. She often posts pictures on social media.