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1·England must win this game to be sure of qualifying.

英格兰队必须拿下这场比赛才能确保获得资格。《牛津词典》

2·England must win this game to be sure of qualifying for the World Cup.

英格兰队必须拿下这场比赛才能确保获得世界杯的参赛资格。《牛津词典》

3·A lot of people think that it's better to pay for their education so that they can be sure of getting quality.

很多人认为最好是自己掏钱受教育，为的是能肯定得到高品质的教育。《柯林斯英汉双解大词典》

4·You may be sure of that, said the hair-comb.

“你可以相信我的话。”梳子说。

5·We have to be sure of that first.

我们得确信这是第一位的。

6·Be sure of hay till the end of May.

不到五月底，干草不可弃。

7·They could not always be sure of that.

他们也许并非总是有把握这样看的。

8·But neither can Mr Cuomo be sure of winning.

但是，Cuomo先生也不确定其会赢得官司。

9·Put yourself in the position of sceptic, what can I be sure of?

将你自身置于怀疑论的位置上，你能够确定些什么呢？

10·To be sure of someone's age, we must ask for the date of birth.

为了确认某人的年龄，我们就必须问他们的生日。