—Why do you look so worried?—My computer broke down and my essay ______ unfinished since.
We are lucky to be among the generation of people who have ______ and experienced the great social changes in our country.
______ economic, political and cultural difference, China and America have decided to cooperate in dealing with global issues.
Little children ask endless questions because they are ______ about everything.
--Jack fell off the ladder yesterday, but he is all right now. --What a lucky dog! He ______ himself badly.
The writer conveyed a positive attitude through his works.______, his readers are motivated and are themselves becoming a source of motivation for others.