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．

You'd better not．

Yes, please．

No, you can't

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

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

hardly

greatly

clearly

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

Though

Unless

If

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

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

increase

reduce

produce

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

－You ________ take my motorcycle if you want．

may

must

need

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

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

shortest

strongest

tallest

－Hello! Could I speak to Tony?

－________ He is coming．

Hold on, please．

This is Tony speaking．

Can I take a message?

－What do you think of this novel?

－Oh, ________．It is well worth reading．

boring

terrible

wonderful

－Who helped you mend the kitchen fan yesterday?

－________．I mended it all by myself．

Somebody

Nobody

Anybody