How does bill help mum about the house?

1) what are you doing now? 2)how much is it? 3)who plays football? 4)when do you must visit your grandmother? 5)are you reading book now? 6)where do you live? 7)is he drinking coke now? 8)why are you walking now?

1.i see the plane in the sky.

2. a lot of factories polute our atmosphere.

3. sun is the biggest star in our galaxy.

4. people went to the moon in the 20th century.