“滴自己的汗，吃自己的饭，自己的事情自己干，靠人靠天靠祖上，不算是好汉！”陶行知先生的这段话启示我们要  [ ]

A．自立自强

B．自尊自信

C．热爱生活

D．拒绝帮助

Thank you for all your hard work last week. I don't think we ______ it without you.[ ]

A. can manage

B. could have managed

C. could manage

D. can have managed