6、。(16分)can do can't housework1.Mysister________useacomputer.2.Whatcanthey________athome?3.Bencanhelphismotherdo________.4.________youwashtheclothes?七、按要求完成句子。(8分)1.Hecancleanthedesks.______hecleanthedesks?(改为一般疑问句)2.Alicecanplaychess.Alice______playchess.(变否定句)3.CanMikeplayc