I used to go camping a lot, so it isn’t the first time I ____in a tent.

I’ll have my winter(冬天) vacation(假日) in Xiamen this year.–It’s a nice place. ____ your vacation.

We’re tired because we have ________ yin.

We all find ________dangerous to skate on the thin ice.

What does the fresh juice contain ?— of the juice orange . It’s very pure .