— We haven't been to the Great Wall for ages. — No, I don't remember how many years ago _______ I last visited it.
—You___________ stop me. —Even if you __________it, I won't allow you to swim across the river.
On the long journey, Peter ________ a most interesting guide. We all had a wonderful time.
__________ entered the office when he realized that he had forgotten his report.
For quite____________ students, their teacher’s advice is more important than___________ of their parents’.
For many Beijingers, dreams of living in ___________ green area are becoming___________ reality.