1．Don't worry.The hard work that you do now __________________(repay)later in life.
2. The polluted water is about to________________(clean)．
3. More advances in science ______________(make)in the future.
4．We're going to ______________(leave)behind by the rest of the world.
5．An order came ________ all the vehicles having seven or fewer seats should not be charged on the highway during the eightday holiday.
6．The young man，who by then ________________(admit)to university，decided to do some parttime jobs to pay for his education.
