Mary _____ be in London because I saw her in town just now.
.______Hard you may try, you can’t possibly persuade Tom to give up smoking, for he is so addicted to it.
Every year, Tom remembers to have some flowers______to her mother on her birthday.
It’s not easy to learn English well. ______as much as possible is necessary.
-----Peter, would you like a beer to go with your meal? -----Gure, it ______.
Oct.1st, ______is our National Day, is always celebrated with singing and dancig.