Lucy ________ guitar lessons every three weeks in the past three years, but now she is considering she'll make it every other week.
John is the only one of the students in our class that never ________ a mistake even when it is pointed out to him.
Only after leaving home ________ the true meaning of the proverb, “East or west, home is best.”
--- Why do you suggest Mount Lu? --- I believe________ beauty of nature there will make________ excellent impression on you.
-–Could you take my place and go to meet Smith? ---________. --- He is a tall man wearing short hair.
The population of Africa is ________ so rapidly as to cause great concern of the whole world.