Once a year , people take part in “ _________ Lights ” activity to help save energy .

How long_________each other before they_________married?—For about a year.

What will the weather be like tomorrow? — It ______ be rainy, cloudy or sunny. Who knows?

Have you ever visited Germany?—____________. But I expect to go there again.

I can’t buy this bike, because it is_____ expensive.