—I called you at 8 O’ clock yesterday evening, but nobody answered.— Sorry. I ______ the “ Moving China 2012” award on TV. I was so deeply moved that I missed your call.
—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.
—This is _______ fascinating museum I have ever visited. —Yes. I’ve never seen a _______ one.