空格可能的答案是？The study revealed that .................... tended not to modifytheir ordinary speech patterns when interacting with their babies.  

空格类型分别是？  By collecting the.................... of snails and analysing them, they discovered evidence of achange in water levels in a .................... in the region. 

空格答案有可能是：With novels, the...............are the most important thing. 

请进行空格分析： One cause of pollution is ........................................... that burn a particular fuel.