题目

“Well, I’ll tell you a secret ...” said the boy, with his mouth almost _____ my ear.A. touched B. touchingC. touch D. to touch 答案：B已知集合M={y|y=x2-1，x∈R}，N={x|y=2-x2}，则M∩N=（　　）A．[-1，+∞）B．[-1，2]C．[2，+∞)D．?