4、leepingoverthere.A.keepquietB.tokeepquietC.keepquietly()31.Sorry,I forgot____a pen. May I use yours?A.buy B.to buy C.buying ()32.Do you know the boy____Da Ming?10/10A.call B.called C.calling ()33.Mysisteris________thanIA.manythinnerB.muchthinnerC.alittlethin