_____chapter in Oxford English often consists of four parts．—That’s right．And this chapter mainly talks about _____environmental problems．

You’d better ____ football in the street.

Excuse me! You can’t take photos here．Look at the sign. It says “NO PHOTOS”．— Sorry，I _________ see it and I _______ do it.

She is ______Hong Kong next week.

I ________ my hometown for a long time. I really miss it!