试题来源：剑桥商务英语初级-13
【单选题】 Please enter without knocking A. You don't have to knock before you go in. B. Please don't come in now. C. You can go in without opening the door.
参考答案：A
网考网解析：
without“不经，没有”。
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试题来源：剑桥商务英语初级-13
【单选题】 Please enter without knocking A. You don't have to knock before you go in. B. Please don't come in now. C. You can go in without opening the door.
参考答案：A
网考网解析：
without“不经，没有”。
... 查看试题解析出处>>
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