托福写作句型:比较对比句怎么写

　　Movies: serious or entertaining?

　　Therefore, the merits(advantage) encompassed within serious movies far outweigh those of entertaining movies.

　　Adervertising is the main cause of unhealthy eating habits.

　　In reality, compared with other sources of negative influences, advertising only plays a small role. the eating habits are formed on the basis of many complicated factors.Therefore, it is rash to consider it a major cause of those unhealthy eating habits.

　　Compared with A, B...中的A和B是两个同类的事物