【简答题】The president acknowledged that he had somehow________ his ability to communicate to the British people.(未能做到,失败)
【单选题】某同学在自己收集到的氧气中做“铁丝在氧气中燃烧”的实验,结果没有观察到“火星四射”的现象.造成此实验失败的不可能原因是( )
【简答题】Please write down in English. 1. 做。。。失败; 未能。。。做到 (写三个单词,缩写词后加实心圆点)