________to the zoo, turn left when you come to the crossroads．

My brother and I had fun _________ in the river this summer vacation.

We must do everything we can          waste water from running into rivers.

---Mr Wang enjoys ______ jokes and often makes us _______.---So he is. He is also friendly.

—I like drinking wine. But people who drink wine aren’t allowed to drive.—If I        you, I would give up      wine.