Some researchers believe that there is no doubt ______a cure for AIDS will be found.

How could I thank you enough – Don’t mention it. Any otherman_____that.

–What did Mr Jones do before he moved here-He_______ a city bus for over twenty-fiveyears

erage price of commercial houses in our city hasreduced by _____ 30 percent ,so we can buy one at _____ low price .

The room is in a terrible mess; it have been cleaned.