在下面一段文字横线处补写恰当的语句，使整段文字语义完整连贯，内容贴近，逻辑严密。每处不超过15个字。

    传统社会中，诚信是做人之本，____，那么他就难以立身处世。在我国古代社会，诚信不仅是调节个人行为的道德规范，而且是为大多数人所尊奉，具有普遍意义的伦理道德。它要求个人对内立足于“诚”，坚持自我本真和独立，不趋炎附势，不随波逐流；____，信守自己的承诺，不出尔反尔，不人云亦云。诚信更应成为现代社会的基本规范，然而____。当前市场经济环境下的某些无序和道德失范，已成为社会生活中的突出问题。因此，在社会主义市场经济体制建立和完善的过程中，特别需要诚信来维系，需要诚信的精神价值的支持。

C

    There are many kinds of clubs in the US middle schools, such as the music club, the sports club, the chess club, the swimming club… But do you know the homework club? It is a popular club in many US middle schools. More and more students spend their afternoons in the homework clubs. The US middle school students need a quiet place to study in. But games, computers and TVs are all around them at home. So the homework club is just for them to do their homework. The club is quiet and it's good for students to study in it. Some teachers are there, too. They can answer students' questions and help with their homework. If students finish their homework on time, they will get a snack. It's always children's favorite food. Then they can go home and play games or watch TV happily.