Question

Use simple present or present continuous in the following sentences :
1) Water ( boil ) at 100 degrees Celsius .
2) My sister ( not work ) at the moment .
3) Grandpa ( not read ) the newspaper every morning .
4) We usually ( not buy ) our tickets here .
5) They ( know ) a lot of Christmas carols .
6) He cannot go out right now. He ( write ) a latter .
7) What time she normally ( go ) to school ?
8) My brother is busy . He ( wash ) the car .
9) Listen ! They ( sing ) .
10) What you ( do ) right now ?

Answer 1

1. boils
2. is not working
3.doesn't read
4. don't buy
5.know
6. is writing 
7.goes
8. is washing
9. are singing
10.what are you doing