题目

---Jane, you’ve made such great efforts that you are ________ to pass the exam. ---It is very kind of you to say so, Mr. Smith. A. easy              B. bound              C. possible                D. convenient 答案：B给出下列程序，且当输入1时，输出值为3；输入0时，输出值为2．则当输入x值为-1时，输出值为A.1B.-1C.0D.2