选词填空

in good health    pull out of    be related to    play an important role    be sensitive to    have an effect on    turn off    be supposed to

 
Teachers, words often ___________ the primary school students.
My grandmother is ____________________, though she is over 80.
She ____________________ do an hour's homework every evening.
China ____________________ in international relations.
Don't forget to ____________________ the light when you leave the room.
All of the trucks ____________________ the gas station at the same time.
My teeth seem to ____________________ heat and cold.
Much of the crime in this area ____________________ drug abuse.