Mr. Green didn’t understand _______made his daughter so absent-minded this morning.

It is not when to start the job but who to start ______is of importance.

It’s not       the whole nation rose up and drove the enemy out of their homeland.

--I can’t find John .Where did you meet him this morning?
-- It was in the hotel _____ he stayed.

．I just wonder           that you don’t want to cooperate with me.

---Where was ______ you picked up the wallet ?
--- Let me see --- , just at the second counter on the left.

Between the two generations, it is often their different views of life and value _____ cause family conflicts.

_____ his father came back from work_____ his homework.

It was not until she had finished all her work_______home tired

It was _____ several years ____ I had an opportunity of seeing the bird again .