Some young people like reading novels on their mobile phones after turning off the light at night.—Don’t you think it is to their eyes?

It’s difficult for me____ an English letter.[ ]

This is ____ orange book and that is ____ apple.

I can’t believe these photos ______ by such a little girl.

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