-What a pity! He got nothing in ______ for his hard work..
He is difficult ________.
The number of people present at the meeting _________ about 1000 , a large number of whom _______ experts from abroad.
You can hardly imagine what great difficulty we had _________ the task.
It is in Qingdao ______ you are going to pay a visit to ______ this kind of washing machine is produced.
From his _______ look, we could see that he hadn’t expected that we could raise such _______ questions to him.