I think _____ necessary to accept his advice because it’s of great ______ to me,
This is _______ important book. It helped me a lot in ________ old days.
―Would you like to visit the new museum with us this Sunday?―____________, but I will have to work then.
_______the Shouxihu Park, please turn right after you _______ the bridge.
― Hello! May I speak to Mary please? ― ________. I will go and get her.
―Why are you in such a hurry, John? ―There ________ a basketball match between Class Three and our class in ten minutes.