This building is both a secret and a mystery. No one shall be admitted into it he can giv

发布时间：2020-08-16 21:23:18

This building is both a secret and a mystery. No one shall be admitted into it      he can give the right password.
A. if
B. as
C. since
D. unless

网友回答

A. if
B. as
C. since
(答案→)D. unless
解析：考查连词。句意为这幢楼是一个秘密和迷。没有人可以被允许进入，除非他可以得到正确的密码。
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