Ⅰ. 单句语法填空
1. When we breathe (breath), the air goes into our lung.
2. He has never been concerned (concern) about what others think of him.
3. The ship would have sunk (sink)with all on board but for the captain.
4. If the sensor is faulty (fault) , this temperature will usually be quite high.
5. He stood up, signaling(signal) the officer that he had finished with his client.