翻译以下短语并完成句子。
1. a danger/warning signal ____
2. traffic signal ____
3. a stop signal ____
4. signal ( to) sb. to do sth.___
5. signal to sb. ____
6. signal that___
7. She___ him to follow .她示意他跟她走.
8. He ____ that it was time to leave. 他示意该走了.
9. Rapid breathing is a ____ and you should call your doctor.
呼吸急促是个危险的信号,该去请你的医生了.
