1
a reads, is reading
b rains
c are going
2
bought, Did we buy a new car on Tuesday? We didn't buy a new car on Tuesday.
did, Did Mike do his homework yesterday? Mike didn't do his homework yesterday.
stayed, Did they stay at home yesterday? They didn't stay at home yesterday
3
is speaking. Is the woman speaking with her daughter now? The woman isn't speaking with her daughter now.
is learning. Is he learning English Grammar. He is learning English Grammar.
is helping. Is Mary helping her mother to cook. Mary isn't helping her mother to cook.