Whole grains are higher in fibre than processed grains, making them harder________.

 ---What does he want to do after he finishes middle school?---He has made up his mind to join the army rather than______ to college.

 When I returned home ,I found the window _____and something____.

 _______ to the discovery of radium, Madame Curie plays an important role in modernscience. 

—How was your trip?—Fine but ______．Milan was interesting．It’ s bigger than I expected, however a little ______ and dirtier．