He is one of the boys who ______ (很难打定主意) in his class.have trouble (in) making

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问题 He is one of the boys who ______ (很难打定主意) in his class.

选项

答案 have trouble (in) making up their minds

解析 “有困难做……”have trouble (in) doing...;“打定主意”make up one’s mind。定语从句的主语who是指先行词boys,因此定语从句的谓语动问应用复数形式,即have;另外,在make up one’s mind短语中,mind有单复数形式的变化,应与one’s—致,本句中one’s是复数,所以mind应该用minds。
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