一、单词拼写。
结合语境，根据汉语或首字母提示用单词的适当形式填空。
1. The h__________ of the door is off.
2. Don’t come to the c__________ before you make a careful investigation.
3. We d__________ Lincoln High School in the baseball game yesterday.
4. Some chemical are easily a__________ into the bloodstream, while others are not.
