英语翻译Nobody knows for sure when people began to make fire,but

Nobody knows how people began to use fire,does he? Jenny has gone to beijing ,but nobody knows when she ___ A.l No one knows for sure when the first people arrived in ____ 英语翻译people began to make robots about several hundred years 英语翻译（1）No one knows for sure when advertising first started. But when my sight began to return,I was able to make out a b 英语翻译Christian Bucks may be young,but he sure knows how to be no one but" wrong" way corrigan knows for sure翻译 英语翻译but people are often reproached for unpunctuality when t 求翻译 As for me,I wasnt quite sure what to make of it all,but 英语翻译walt disney began to make cartoon wovies when he wasa yo 英语翻译We do not know when man first began to use salt,but we d