Prisons in some countries are short of staff, ______ means each prison officer is overworked and underpaid.

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问题 Prisons in some countries are short of staff, ______ means each prison officer is overworked and underpaid.

选项 A、which
B、this
C、what
D、it

答案A

解析 which引导的修饰整个主句的非限制性定语从句,一般对主句的内容做进一步的说明,相当于一个并列分句,此时which可用and this代替。另外,which在从句中作主语时,谓语动词要用第三人称单数,如;She doesn’t like him to watch TV,which makes him very angry.她不喜欢他看电视,这让他很生气。
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