题目

You are ________ smoke in the room. You can go out and smoke there.A. not wanted to B. not asked to C. not supposed to D. not made to 答案：【答案】C【解析】句意：你不应该在房间里抽烟。你可以出去抽烟。考查动词短语词义辨析。A. not wanted to不被希望；B. not asked to不被要求；C. not supposed to不应该；D. not made to不可，不被许可。结合句意和语境可知选C。若过平面α上的点A的直线a⊥α,求证:a是唯一的.