is playing
 like
 looked, was raining, were hurring
 did, am having
- came saw, was sitting, was reading, lives
 were was rang answered was was reading didn't hear
 are you doing was working was didn't see
 was working
 was rainng
 is, is is doing
Думаю,дальше сам разберешься:)

1.Nina celebrated her birthday yesterday.Her room looked beatiful,there were many flowers in it.When I came in,somebody was playing the piano,two or there pairs were dancing. 2. Listen! Somebody is playing the piano.3.I like music very much. 4. When I looked out of the window,it was raining heavily and people were hurrying along the streets. 5.What were you doing at seven o.clock yesterday-I was having supper. 6. When I came home yesterday,I saw that all my family was sitting round the table.Father was reading a letter from my uncle who lives in Kiev. 7. Where were you yesterday?-I was at home the whole day.-How strange. I rang/was ringing you up at two o.clock,but nobody answered.-Oh,I was in the garden.I was reading your book and didn't hear the telephone.8.What were you doing at five o'clock yesterday? -I was working at my English from five tiil seven.10.It was raining the whole day yesterday.11.Where is your sister now?-She is in her room.She is doing her homework.