4.She won't be happy if she sees this mess. 如果她看到这样乱七八糟的话，她会不高兴的。5. For one week, she did not do any housework and neither did I. 整整一周，她什么家务
2avoid是及物动词，可接名词、代词或动名词作宾语，不接动词不定式，可用于被动结构。You had better avoid reading in the train.句中的reading不可改成to read。
