№1
1)The waitrees isn't taking our cash - cheecks ;Is the waitrees taking our cash - cheecks
2)Nikulin and Petrov aren't talking; Are Nikulin and Petrov talking?
3)I'm not reading a very interesting book now; Am I reading a very interesting book now?
4)I wasn't preparing my homework at 6 o'clock; Was I preparing my homework at 6 o'clock?
5)My song won't be having breakfast at this time tomorrow; Will my son be having breakfast at this time tomorrow?
№2
1)Now I'm not,but I usually do have some English lessons
2)I have literally no idea what he's writing
3)Now I'm trying to speak English
4)I guess he isn't
5)We're sitting at the moment.
№3
1)Who is passing me the salt? What is nick passing me?
2)Who's buying some sweets here? What am I buying here?
3)Who is eating the soup without bread? Whose soup are eating these children without bread?
№4
1)с
2)с
3)b
4)c