We now know that about ____ of all the kinds of seaweed are animals.A: one fourB: once

Today we know more about ______. We’re better at preventing illness.A: medicineB: pollu

Today we know more about ______. We’re better at preventing illness.A: pollutionB: envir

You know, I have three kids now. －－ ________ A Oh, I’ve heard a lot about you B That’s

Its already dark now. Dont you think its about time______？A．we are having dinnerB．we have

All we know about the origin of language is that men, unlike animals, ______ invented cert

From the first paragraph we know that __________.