Are you classmates — No, we go to different ____________.

I am sorry I didn’t finish the task—Never mind________，you have tried your best

About_____ of the earth__ __covered with water, but we have less and less available fresh water.

healthy life is frequently thought to be_____with the open countryside and home-grown food.

Jim _______ride to school. But now he_______walking to school because he wants to keep fit.