Here are some tips to help you stay safe when (use) ________ride-hailing apps.us

游客2023-09-29 17

问题 Here are some tips to help you stay safe when (use) ________ride-hailing apps.

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答案 using

解析本题考查现在分词作状语。use的逻辑主语与句子的主语you一致，二者是主动的关系，故用现在分词using作状语。

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Herearesometipstohelpyoustaysafewhen(use)______ride-hailingapps.usin