托业考试

【单选题】All staff members are reminded that you should not use the executive restroom ______ you have written authorization to do so.

A、for
B、unless
C、without
D、although

网考网参考答案：B
网考网解析：
横线前后都是完整结构，故横线处应填入连词。先排除介词(C)without，将其他备选答案一一代入后分析金句。you have written authorization to do so(有书面批准)是use the executive restroom(使用主管休息室)的条件，故答案是(B)unless。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>