— If we go on polluting the world, it won’t be fit for us to live in.— ____. We’ve got to do something about pollution.
It was ____________ she lost her job ____________ she realized how important it is that one should study all the time.
Hurricane Sandy,one of the biggest storms ever, hit the East Coast of the US on Oct. 29,___________ transportation.
In spite of the advanced medical technology,many Americans have no ___________ to health care.
Nuclear radiation is said __________ the biggest health challenge in Japanese Earthquake over the past few months.
He felt ___________ of cheating in the exam,deciding never to do such things again.