The importance ______ a national day and how it is celebrated are very different from country to country.

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

Professor Smith, along with his assistants, ________ on the project day and night to meet the deadline.

What is the way George thought of  ______ enough money to buy the house?

.---I’ m sorry, but I didn’t mean__________ out your secret.---But you know, letting out one’s secret means________ one’ s feelings.