Which of the following signs means “Throw litter here.”？

 —Excuse me，may I take a seat here?

—________ The man on the seat has already left.

A. You'd better not.  B. Yes，please.  C. No，you can't

 —Did you find the small village where you once worked?

—Yes，without any difficulty，for it has ________ changed over years.

A. hardly  B. greatly  C. clearly

________ we break the traffic rules，we may get a fine and even be in danger.

A. Though  B. Unless  C. If

—We'd better not buy cups or boxes which can be used only once.

—That's right. It will save energy and ________ waste.

A. increase  B. reduce  C. produce

—It's such a long distance. What should I do?

—You ________ take my motorcycle if you want.

A. may  B. must  C. need

—Who can reach the book on the top of the shelf?

—Xiaoqiang can. He is the ________ boy in our class.

A. shortest  B. strongest  C. tallest

 —Hello! Could I speak to Tony?

—________ He is coming.

A. Hold on，please.  B. This is Tony speaking.

C. Can I take a message?

—What do you think of this novel?

—Oh，________. It is well worth reading.

A. boring  B. terrible  C. wonderful

—Who helped you mend the kitchen fan yesterday?

—________. I mended it all by myself.

A. Somebody  B. Nobody  C. Anybody