昨天莉莉在会议上什么也没说
Lily said nothing in the meeting yesterday.
（1）昨晚我一直给妈妈打电话,但没人接.I kept calling my mom,but nobody answered the phone.
（2）我们没有一个人去过美国.None of us have ever been to the US.
（3）直到今天早上才有人告诉我这件事的真相.Nobody told me thetruth until this morning.
这些中译英句子都是测验否定代词的.nobody,none,nothing.