题目内容
12.He didn't know what washappening (发生) outside.分析 他不知道外面正发生什么.
解答 答案:happening.
根据提示汉语结合语境推测句意是"他不知道外面正发生什么.",由设空处前面的was判断设空处应填动词的现在分词,构成过去进行时,过去进行时的构成是:主语+was/were+动词的现在分词,提示词"发生"是happen,所以答案是:happening
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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