He made another wonderful discovery, _______________ of great importance to science.
— Honey, this is a present for your birthday. — Ah! A pair of shoes, a well-known brand — Nike! I think it must ______ comfortably.
The most important thing to keep in ______ mind when dealing with______ emergency is to stay calm.
________you never plan to visit the polar bears in the North Pole or the penguins in the South Pole,now it is the proper time to start thinking about that.
Liu Xiang’s talent for running and his ability to learn from his experiences________greatly to his many successes in sports.
There was________much smoke________they couldn’t see across the hallway.