It ______ quite correct that happiness comes from thinking about things in a positive way.

一When did you learn the news that Obama made a trip to Canada as President?一 ____ was on my return．

He called at every door, urging that people ________his products.

At Cannes Film Festival, we noticed Fan Bingbing _________ a beautiful evening dress of imperial robe as she entered the hall.

— Did Alice enjoy the concert held in Grand Theater yesterday? — Yes, she did. She _____ such an excellent concert for a long time.