小题1:My brother ________ thirteen and I ________ fourteen. We ________ both in Grade 7. (be). 小题2:This is ________ eraser, it isn’t ________ toy.(a). 小题3:________ (this) books are for us. 小题4:Is that ________ (you) book? No, it’s ________ (she) book. 小题5:They are in the________ grade , but in ________ classes.(same)