【正确答案】 A

【答案解析】faulty：有错误的；有毛病的。wrong：有错误的；有毛病的。Cheating is always wrong． ambiguous：歧义的；模棱两可的。This sentence is ambiguous．unclear：不清楚。His itinerary is still unclear. unbelievable：不可信的。I find it unbelievable that people can accept his sort of behavior.