单词拼写。 |
1. He was interested in a _____ and always stayed up at night to watch the stars. 2. Computer hackers have broken down security s ____, raising questions about the safety of information. 3. There is a lot of rubbish ____(漂浮)on the surface of the river. 4. W _____(当心 )out! There is a car coming! 5. Every time an English runner won a race, the crowd c ____ . |