---You were brave enough to raise objections (反对) at the meeting.---Well, now I regret _______ that.
I didn’t believe the reasons he explained _____ me.
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 isproduced.