单项选择题
--What about going for a walk? ---（）
A.Why not? A good idea B.That’s all right C.So, do I D.Walking is good to you
单项选择题 Why（）the old block of flats（）demolished next month?
单项选择题 The sun heats the earth,（）is very important to living things.
单项选择题 A group of （） will come to our school tomorrow.
