Every exercise in the book(design)______ to build up your reasoning skills.is/wa

游客2024-06-26  16

问题 Every exercise in the book(design)______ to build up your reasoning skills.

选项

答案 is/was designed

解析 本题考查动词被动语态的用法。动词design和主语every exercise之间是被动关系,所以需要用动词的被动式be designed;又因为主语是单数,所以用is/was designed。
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