______, glasses can correct most sight defects in healthy eyes.A、When well fitte

游客2023-11-12  13

问题 ______, glasses can correct most sight defects in healthy eyes.

选项 A、When well fitted
B、Well fitted when
C、Well fitted if
D、If well fitted when

答案 A

解析 分词。原句中已出现完整句子,那么前面填入的只能是从句。when well fitted是when they are well fitted的省略形式。
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