34. This is____ a difficult problem ____ all of us can't work it out.
There is so much noise in the yard that I can’t ________ my attention on my work.
—______ he said at the meeting made everyone present angry.— Yes.We all ______ him of his rudeness.
_______it not been for the free ticket, I would not have gone to the cinema.
The number of people invited __________fifty, but a number of them__________ absent for different reasons.
all the required papers, he didn’t answer the questions fluently in class.