i'm certain of finishing my homework. are you certain of looking after my sister? he is ...visiting his aunt we are certain of working harder. 我确信完成我的作业 你确定会照看我的妹妹吗 他肯定会拜访他的阿姨 我们确信会工作更努力 希望对你有用!
He is certain of winning the match. 他确信能赢这场比赛。 If you to be certain of seeing play in London, you to book your seat advance. 如果你想确定的看到在伦敦的剧场, 你必须提前预订座位 There is nothing of the universe...