My students are all quiet.Even after class, my students spend ___as they can playing outside.
It’s based on the idea ______ all people are created equal, ______ is accepted by most people.
______ the ancient Egyptians built the pyramids puzzled people for centuries.
______ I’m well again, I can go on with my work.
The government has to close those small factories to prevent the water of the river ______.
We should try our best to ______ those people after the disaster.