There are six floors ______our school building. Our class is ______ the third floor.

I really think________impossible to finish the work in such a short time，don’t you think so?[ ]

What if he failed in the next monthly examination again—I don’t know. ________ heart and be reduced ________ the class

st have been there, ____________

_____ many other developingcountries, has suffered the misery of war and experienced major changes overthe last 100 years.