17A
1. flows
2. live
3. stays
4. is raining
5. am leaving
6. is not working
7. is doing
8. quarrel
9. moves
10. are crossing
11. fly
12. laught
13. is talking
18A
1. crying
2. comes
3. starts
4. aren't getting. quarrel
5. read. are reading.
6. is working
7. see. is going.
8. are. are playing
9. are you doing. I am making.
10. is coming
19A
1. They are singing my favority song.
2. I am laughing at you
3. He is showing photos with cats.
4. I am looking at thet person.
5. I am hidding a bouquet of roses for you.
6. Teacher is explaining rule about Present Continuous Tense.