按字母表的顺序,排列正确的一组是 。
It’s 9:00 now. It is time for us _____ sports.
--- Excuse me, what is on the wall of the classroom? --- Oh, ______ a blackboard , two doors and five windows.
I love my new school because the teachers ________ very kind to me.
---Shall we go shopping? ---Good idea! But the supermarket _______ now.
Do you think Maths ______ useful subject?