-What are you busy doing, Sandy?- I’m making some flash cards _________ me remember English words.
The students ought to wear school uniforms when they’re at school.
Mr. Green is very happy because he is satisfied with his students’ work today.
_______ the teachers in their school is about 200 and one fourth of them are _______ teachers.
He didn’t go to school yesterday ________ he was ill.
---Could you tell me _________?---You can take the No. 1 bus.