There is no doubt _______ nearsightedness is a serious problem among the youth of our country.
Mary had to call a taxi because the box was ________ to carry all the way home.
He knows several languages ________ English, French and Japanese.
The money collected should be made good use ________ the people in Sichuan Province who suffered a lot in the earthquake.
________ it is to have a cold drink on such a hot day!
Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.