Have you done ____ to improve the environment ?
There are many birds ________ among the trees. A. flying B. fly C. to fly
__________ of the students likes reading. They both like playing sports. A. None B. Neither C. All
--- The population of China is really large!--- __________ We should take measures to control it.A. So it is.B. So he isC. So is it..
--- Why should we plant more trees to protect the environment?--- Because trees can stop the wind from ________ the earth _________.A. washing ;awayB. blowing; awayC. changing ;into
--- Have you found your lost book_____? --- No, I haven’t. A. already B. yet C. Still