There are two things he is not sure about.
有两件事他没把握。
Be sure to write and tell me all the news.
一定要写信告诉我所有的消息。
I must go back and make sure (that) I closed the door.
我必须回去确认我已关好了门。
完成句子
①Before you go to the meeting,you'd better
(弄准时间).
②I don't know where he lives
(肯定地).
③You must
(确保灯都关了)before you leave the office.
【答案】 ①make sure of the time ②for sure
③make sure that all the lights are turned off
(2)risky adj.危险的,冒险的,大胆的
Life as an aid worker can be a risky business.
救援人员的工作可能会十分危险。
Doctors say it's too risky to operate.
医生说动手术风险太大。
risk n.风险,危险vt.冒……的危险
risk doing sth.冒……危险;明知……也要做
at risk处于危险中
at the risk of冒……的危险
take/run the risk of冒……的危险
Are you prepared to risk traveling without an armed guard?
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