题目

—Billy, you are very confident all the time, how do you make it?—I think confidence is more than just an attitude, it comes from a strong ________ to take responsibility rather than just let life happen.A.present B.care C.promise D.protect 答案：【答案】C【解析】句意：——比利，你一直都很自信，你是怎么做到的？——我认为自信不仅仅是一种态度，它来自一个坚定的承诺，即承担责任，而不是让生活发生。考查名词， A. present 现在，礼物；B. care照料，谨慎；C. promise允诺，诺言；D. protect保护。根据后面不定式部分“to take responsibility rather 某物质隔绝空气加热分解，产物分别是氧化铜、水和二氧化碳，则该物质含有的全部元素是（ ）A．Cu、O、CB．Cu、C、O、HC．O、H、CuD．Cu、H、C