( )The classroom is ten years ______ .
—What's that? —That's ________ uniform. A.a B.an
—I like________. —Me too. A.mangos B.mangoes
—Is that ________ sweater? —No,it isn't. A.you B.your
—This is ________ yacht. —How nice! A.my B.I
—________is this? —It is a watch. A.HowB.What