When they walked along the river，they suddenly heard somebody ________ for help．

题型：单选题题类：常考题难易度：普通

牛津译林版英语八年级下册Unit3Online tours单元检测题（二）

A、called B、call C、to call D、calling

举一反三

点拨：{#blank#}1{#/blank#}意为"当……时候"，后面通常接时间点，从句中谓语动词用短暂性动词。另外，while，意为"当……时候"，后面只能接一段时间，不能接时间点，其引导的从句的动作或状态往往与主句的动作同时发生。

While we were walking home, it began to rain.＝ {#blank#}2{#/blank#}

一 No, I didn't I at that time.

—Sorry, I ____ the flowers in the garden at that time.

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