#2

1. is studying.

2. aren't going.

3. isn't enjoying.

4. are (you) seeing.

5. are (you) going.

6. are (they) laughing.

7. is having.

8. aren't listening.

#3

1. Mario comes from Italy.

2. We usually go by bus.

3. He speaks Mandarin and Japanese.

4. What a great meal! Everyone's enjoying it.

5. I love coffee ice cream.

6. What are you doing tonight?

#4

1. goes.

2. think.

3. are meeting.

4. are (you) doing.

5. looks.

6. are (you) coming.