—Bob, this is my friend, Dale.—Hi, Dale. ________
---I heard your grandpa used to be a teacher. --- Yes. He was a Chinese teacher ______.
---_____unusual music he is playing!--- Yes, all of the students are losing themselves in it.
According to_____WHO, all big cities need health care plans to prevent_____spread of AIDS.
Xuzhou is a place with many forests. It is reported that nearly one-third of its land _________ covered with forests.
—Can you understand what I said, Ben?—No problem. I can ___________ follow you.