(?) Is she  swimming at the moment ? 
3.(+) They are  painting the room now .
(-) They aren't  painting the room now .
4.(+)She is cleaning the house now.
(?)Is she cleaning the house now ?
5.(-) My dad isn't repairing some household appliances.
(?)Is your dad repairing some household appliances.?
6.(+)It is  raining outside. 
(?) Is it  raining outside ?
7.The students are presenting about how to protect the environment .
(-) are the students presenting about how to protect the environment ?
8.
(-) they aren't listening to the radio now .
(?) are they listening to the radio now ?
9.
(+) Kate is talking to her friends at the moment 
(-)is Kate talking to her friends at the moment 
10.
(+)Teachers are giving any homework today
(?) are teachers giving any homework today ?