单项选择题A.The machine isn’t working.B.They can’t decide on a video.C.Susan’s mother is going to use it.D.Susan has to finish her assignment.
单项选择题A.Because nearly 1,000 million acres of land was burned off.B.Because natural resources are being used up.C.Because animals and plants are in danger of extinction.D.Because natural beauty of the land would be ruined.