Yuan Longping makes ____ possible to produce more crops in the same fields with this special strain of rice 

Joan had often heard ____said that Marley had no money.

(2013·安徽名校联考Ⅰ)Lucy is a hard­working and physically active student, ________ has both marks and a fit body.

－Why are you make much noise?－I just can’t help _____.

I certainly consider _____ important that everything in the competition should be fair and open.