A. Let me see. I think it's a toilet for a pet（宠物）.

B. Yes. I do. I like studying them. 

C. Do you know anything about the public signs?

D. OK. What does that sign on the door mean?

A: It's sunny and hot today. Let's go s.

B: Good i. There's a l in the park. The water is clean.

A: We can't swim i this lake. There's a sign n the lake. It m “Danger!”

B: OK. Let's go to the swimming pool(游泳池)

    It's Sunday. Wei Fang and Meimei are on their 1 to the zoo. They are waiting for a 2at the bus stop. Wei Fang 3something on the ground. She picks 4up. Oh, it is a new watch. “5 is it?” They 6the people at the bus stop. But they don't know. “ Let's wait for the owner.” Meimei 7. They wait and wait, but the owner 8come. So they have to give 9to a policeman nearby. The policeman says, “10 good girls you are!”

—He (go) to his factory. He (make) a lot of signs with his friends there.

—Which sign he (make)?

—They all (make) the same signs: No (park). There are always a lot of cars around our house.

—Yes, It m you s sell(卖) the cigarettes(香烟)here. Because this is a school.