单项选择题
Why（）the old block of flats（）demolished next month?
A.are;being B.is;being C.has;been D.have;been
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.
单项选择题 He, as well as I,（）a student.
