If you see a flag ___ __ outside a window, you may know someone in that house __ ____ a birthday.

What class are they having—Math. Their math teacher is _____ the classroom.

Before the storm,fishes in the pond usually________themselves out of the water to get fresh air.[ ]

He didn’t turn up last night, did he? — Yes. But he _______. The meeting had been cancelled.

Teachers should create an environment children are taught how to solve problems of learning by themselves.