-Shall we go hiking this Sunday? -Sorry, I _______. I’ll have to take a piano lesson.
.Everyone should learn ___________about the world.
We go to play volleyball ___________ Friday afternoon.
The students in her class are never late _____ school and they’re nice ____ each other.
It is very good for students to do ___________ in the morning.
Would you like to go to the park with me? ____________.