use,using,used, hear,hearing,heard He tried _______a new microphone and was able to make himself ______.

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问题 use,using,used, hear,hearing,heard
He tried _______a new microphone and was able to make himself ______.

选项

答案using,heard

解析 第一个空用try doing sth.来表示“尝试着做某事”;make oneself done意为“使自己被……”,make后常跟known/understood/heard等过去分词,用来表示“使自己被别人认识/理解/听到”。答案为using,heard。
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