【題目】To prevent more people from being infected(感染),those who are infected with COVID-19(新冠狀病毒）must be s_________ from others.

【答案】separated

【解析】

句意：為了防止更多的人被感染，必須將感染新冠狀病毒的人與其他人分開。

根據(jù)句中“To prevent more people from being infected”可知，為了防止更多人被感染，感染了新冠狀病毒的人必須與其他人分開；separate是動詞，意為“分開”，句中有be動詞，且those與separate之間是邏輯上的被動關(guān)系，所以此處使用被動語態(tài)，結(jié)構(gòu)為be done，separate的過去分詞為separated。故填separated。

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