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1. Muggles often believe brooms are flown at night.

还是不好，再改。
The most of muggles believe brooms are flown at the night.

2.The hover charm and the thrust charm are used to keep a broom in the air.

First, sit on the broom,put your feet on the foot rests, and put your hand on the handle.
Second,when you are flying, to go up you should pull up the brooms with your hands ,and down to make the broom move down.
Third, lean your body to let the broom turn its direction.
Finally, lean your bodyforward to let the broom go faster .
If you want to go slower, use your feet to push down hard with the foot rests.

Air protection charms.

6 hours.(It is the standard time limit,but when you in the match, you will get 0-120 extra minutes.)

It is when a quaffle is nobody's possession.The Chaser should answering correctly to catch the quaffle,and then they can gain possession for their team.

6 hours.

Player A.

The seeker should searching a clue to answer the question.

Yes

48 hours.