What will the weather be like tomorrow? –It____ be rainy, cloudy or sunny. Who knows?

I took the wrong train .I didn’t even know it until half an hour later. [ ]

Can you tell me something about metal ?—Metal making machines and many other things .

Can I smoke here? —No．On no condition ______ in the museum．

Where are Maria and Kangkang?—They _____ England.