第8题: [单项选择]Sometimes children have trouble ______ fact from fiction and may believe that such things actually exist. A. to separate B. separating C. for separating D. of separating 参考答案:B 答案解析:本题考查固定搭配。have trouble(in)doing sth.“做某事有困难”。句意为:有时孩子们在分清故事和现实方面会有困难,相信故事中的事确实存在。