It isn’t clear_____ is to blame.We need to find a solution to the problem first.
We've had a good start, but next, more work needs ____ to achieve the final success.
Time, ____ correctly, is money in the bank.
The lecture, ____ at 7:00 pm last night, was followed by an observation of the moon with telescopes.
(2012江西卷)John has really got the job because he showed me the official letter him it.
(2012江西卷)Having finished her project, she was invited by the school to the new students.