题目

---Excuse me, sir.Would you do me a favour?  --Sure.What is it?          ----I _____ if you could tell me how to pronounce this English word. A. had wondered   B.was wondering   C.would wonder   D. did wonder 答案：B 解析: 根据语境，可知是指“我”在说“请帮个忙好吗”的时候，“我在想…”,所以用过去进行时.已知函数.（1）当时，讨论的单调性；（2）设，若关于的不等式在上有解，求的取值范围.