ПЛИИЗ ХЕЛП МИ!Пристально прочитайте предложения и решите, в каком необходимо употребление

ПЛИИЗ ХЕЛП МИ!
Пристально прочитайте предложения и решите, в каком нужно употребление Present Simple, а в каком Present Continuous.
boil
a) Water ... . Can you turn the kettle off?
b) Water ... at 100 degrees Celsius.
go to bed
a) It is very late. I ... now.
b) My little sister usually ... at 9 o'clock in the evening.
work
a) John ... very hard. He is a great specialist.
b) You always ... . Can you do something else?
live
a) I ... with my cousin until I find my own accomodation.
b) My brother ... in a big city.
think
a) What ... he ... about?
b) I ... it is a brilliant idea.