The Gulf of Mexico (墨西哥湾) is being polluted seriously. That has affected _______ several hundred kinds of sea animals there. [ ]

What will Jack do on vacation? — He’ll go to Disneyland if he _________ enough time.

Do you know _____ he is?—He says “1.75 metres”, but I’m not sure.[ ]

We will only discuss such problems___________something to do with our own interests.

Must I come here at eight o’clock?-No, you ____. You may come a little later.