Listen! There must be someone _________ through the jungle. A. trek B. treking C. trekking
—Don’t be nervous whenever you have a test. —________ .
You look tired these days. I think you need a ________sleep.
He lost his key. It made him ________ in the cold to wait for his wife’s return.
It will be hard for us to get up in the morning if we________ to bed too late.
—Did the radio say ________? —Yes, from Hunan.