--Who has broken the window in my room?
--Who else _________ it but your naughty son!
A. could do B. could have done
C. should have done D. must have done
. The concert by Lang Lang was so well _________ that all the tickets had been _________ on the first three days last month.
A. received; sold out B. recognized; sold out
C. admitted; selling out D. taken; selling out
They _________ on the program for almost one week before I joined them, and now we are still working on it as no good results have come out so far.
A. have worked B. had worked
C. have been working D. had been working
--You look troubled.
--Father asked me to finish this task today. How can I _________ ？
A. manage to B. attampt to C. decide to D. happen to
. After the earthquake, the Haitian（海地的）people needed to be helped _________.
A. occasionally B. anxiously C. practically D. urgently
There is no _________ that the Chinese people will present to the world a successful, splendid and unforgettable exposition（博览会）.
A. belief B. doubt C. possibility D. need
