Mrs.Brown is supposed _________ for Italy last week

teacher, he has never given hisstudents so difficult a problem ____ they can’t work out

Where did the professor made the speech yesterday—It was in the hall ________ the students often have a meeting ________ the professor made the speech yesterday.

I came here for nothing else but to see you _____, but an accident (事故) happened _____[ ]

When I first arrived ________San Francisco,I had a difficult time ________certain aspects of the American way of doing things.