There is no time limitation in such classes so students can repeat exercises ______(想要多少次都可以).

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问题 There is no time limitation in such classes so students can repeat exercises ______(想要多少次都可以).

选项

答案as many times as they need。

解析 考查连接结构as…as,表示“同…一样达到某种程度”。
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