Not until the child fell asleep_______leave the room.
Close the door of fear behind you, and you _____ the door of hope open before you. A. saw B. have seen C. will see D are seeing
Having checked the doors were closed, and _________ all the lights were off, the boy opened the door to his bedroom.
Do not let any failures discourage you, for you can never tell ______close you may be to success.
It is suggested that all these gifts be mailed immediately _________ in time for Christmas.
Chinese scientists have produced an embryo of a giant panda through cloning technology,_____ is a breakthrough ______ could save the endangered animals.