The boy was so tired that he fell asleep _______ his mother could take off his clothes. 

--With the country’s pension fund gap becoming wider than ever, retirement age should be postponed immediately. ---Easier said than done.          we take all factors into account, we shall be faced with some other social problems. 

----_____ would you like your coffee, black or white?--Black,please. I always prefer coffee with nothing in.

I wondered ______ they had raised so much money on their own to help youngsters in need.

---How long do you think it is ______he took up the job?--- Half a year at least.