科学家做过如下实验，将深色桦尺蛾和浅色桦尺蛾分别进行标记，然后放养于不同的地点，一段时间后，将所释放的桦尺蛾尽量收回，统计其数目，结果如下表：

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    Manners are important to happy relations(关系)among people. No one 1 a person with bad manners. A 2 with good manners never laughs at people when they are in trouble. Instead, he 3 to help them. When he asks for something, he says "4." And when he receives something, he 5 says "Thank you". He does not interrupt(打扰) 6 people when they are talking. He does not talk loudly or laugh loudly 7 public. When he sneezes or spits(吐痰), he uses a 8. If you are late, you   9 make an apology (道歉)to the teacher either at the time 10 after class.

根据提示填写单词或词组，每空一词。