_________we must keep in mind is that we must protect water and use it wisely.

I suppose the young beautiful actress is about 20 years old— ________ ! She is still a college student

Thank you for offering to help me with my maths.–_______________.

intelligent people can often _____ thecomplex, a fool is more likely to complicate thesimple

一 It’s said that your journey was not very pleasant.一 We would have enjoyed ourselves, but the car _____ a little crowded.