题目内容
16.Ransomware is a type of malware that prevents users from accessing their system,either by locking the system's screen or by locking the users'files ________ a ransom is paid.( )A. | if | B. | unless | C. | though | D. | when |
分析 勒索是一种恶意软件,它可以通过锁定系统的屏幕或通过锁定用户的文件来阻止用户访问其系统,除非支付赎金.
解答 答案是B.本题考查从属连词辨析.if 如果;unless除非;though虽然;when当…时候;根据语境,"除非"支付了赎金,否则中毒的用户不能访问其系统,故选B.
点评 就从属连词的解题,考生首先要理解各从属连词的含义,并理解各连词所引导的从句的特殊用法;最后结合句子的结构和语境做出符合语义、语法和逻辑常识的选择.
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