单选题 It is very difficult for a child to adhere to rules.
【正确答案】 B
【答案解析】adhere to是个固定短语,它的意思是“遵守、坚持”。Adhere to the rules和follow the rules完全一样。又如:These are the principles we must adhere to.这些就是我们必须要遵循的原则。