---Did you notice Tom was busy all day in his office?---Oh, yes, he has just finished his business tour of Chicago. He has a lot of work to ___.
I cannot______ puzzled, for I simply cannot understand how I could have made such a stupid mistake.
I feel sure that ________ qualification, ability and experience,you are the most qualified one to do the job.
An earthquake ______ Yushu, China in April, 2010, _______ about 2000 deaths.
People who have _______ flood often say that’s _______ .
He was encouraged to start again _________ he had failed.