Present Simple or Present Continuous?

Which is correct?

• I usually go to sleep at 10 o'clock.

• I am usually going to sleep at 10 o'clock.

Which is correct?

• She is knowing the answer, but doesn't want to say it.

• She knows the answer, but doesn't want to say it.

Which is correct?

• Mary goes to work this week.

• Mary is going to work this week.

Which is correct?

• Dan has breakfast currently.

• Dan is having breakfast currently.

Which is correct?

• More and more women train to become pilots these days.

• More and more women are training to become pilots these days.

Which is correct?

• Do you understand what I mean?

• Are you understanding what I mean?

Which of the examples means that someone does something too much?

• I can't find my keys. I'm always losing them.

• I can't find my keys. I always lose them.

Which of the two describes a permanent situation?

• My parents live in London. They have lived there all their lives.

• I’m living with some friends until I find a place of my own.

Which of the two describes an action happening right now?

• The earth goes round the sun.

• The earth is going round the sun.