If our government _____pay attention to the safety of food, our health _____in danger.
I_____ to school by bike, but now I ______.
___ the teachers in their school is about 200 and one fourth of them are ____ teachers.
— When shall we go?— It hasn’t been decided yet. It ____ the weather.
I don’t know _____ he will come or not. _____he comes, I’ll tell you.
We ___ use mobile phones when the plane takes off.