When a friend of mine comes _____ difficulties, I will give him or her my hand the first time.
All I have learned about the exam____ that three students faileD. A. is B. are C. will be D. have been
All but Tom ___that film before.
“____either you or he to go there?” “_____is.”
____of the land in that district ____covered with trees and grass.
Burning all the lights in the classroom will be a great______ on electric power.