с 4 и 5 упражнениями нужно.

1) What ARE.you doING here? – I AM waitING for my friends.

2) What WERE you doING at 4 p.m. yesterday? – I WAS listenING to music.

3) When I CAME in he WAS SHOWING off his new laptop.

4) He WAS LEAVING for work when the phone RANG.

5) Listen! The phone IS RINGING – I’ll answer it.

6) It WAS RAINING when I WOKE up.

7) We WERE GOING shopping when we MET our friends.

8) It’s 12 o’clock now. I AM HAVING a lunch break. 

9) I can’t answer the phone now. I AM HAVING a shower.

10) I’m WATCHING  a very good film now. I AM really enjoyING it.