We have to ____ ourselves when we are away from home.
What is a machine that is used to cool the air in a room by moving it around?
— What time shall we leave for the airport?— It’s foggy today. I’m not sure __________ be closed soon. Let’s go now.
We can’t afford to make any mistakes. To us, __________.
— Someone swam across the Yunlong Lake this morning.— I didn’t see it. I __________ along the lake.
— You are wanted on the phone.— __________ nobody knows I’m here.