---Why do you keep the windows open on such a cold day? ---There are so many students here, so we want to keep the air nice and __.
________of the students in our class________girls. A.Two fifth;is B.Two fifth;are C.Two fifths;are
Can you believe that in________a rich country there should be________many poor people?
—Jimmy didn’t finish his homework yesterday. —________.
My uncle has two pet dogs.But________of them is friendly to me.
—Where is the librarian? —She________to the bookshop.