All the children were swimming in the ri...

All the children were swimming in the river______they heard a girl ____ “help”.

A. when, shouting B. while, to shout

C. when, to shout D. while, shouting

A 【解析】试题分析：句意：所有的孩子正在河里游泳，此时他们听到一个女孩再喊救命。While只能与进行时态连用，故排除B,D；hear sb. doing sth.听到某人正在做某事。When这里是此时的意思。故答案为A。考点：考查连词的用法及非谓语动词。

考点分析：

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