”What’s wrong?” I asked when I saw the little boy outside the window.
—It’s dangerous to swim here. Look at the sign! —Oh, I _______ it.
—Will you give me a hand? I have some trouble_______ the scientific problem. —Don't worry. I'll try my best to help you _______.
You’dbetter_______yourcigarette when you are in the wood.
—What will the weather be like tomorrow? —It _______ be rainy, cloudy or sunny. Who knows?
—_______ are you leaving for Shanghai? —In a couple of months.