题目内容
20.Scientists are working hard to find out a way to cure this special disease caused by an unknownvirus(病毒).分析 科学家正在努力寻找办法治愈这种由未知病毒引起的特殊的疾病.
解答 答案:virus.
根据提示汉语结合语境推测句意是"科学家正在努力寻找办法治愈这种由未知病毒引起的特殊的疾病.",由设空处前面的不定冠词an 判断设空处应填名词单数,提示词"病毒"是virus,所以答案是:virus
点评 做这类题型,首先根据所给汉语明确句子所要考查的单词或短语的拼写,再结合相关语法知识对单词或短语做出形式上的变化.
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