Did you watch the opening of Winter Olympic games?— No, I didn’t. I ______ on the Internet.

Is it the first time you _______ Beijing?—-No. But the first time I ______ here, the city wasn’t so beautiful.

How many students are there on the playground? —_________.

The old man told us _______ and ________.

I’ll try it again．Never in my life _____ such a particular difficulty．