1 . 选词填空：who；whom
1. His strange habit makes sense when you consider that he’s an environmental scientist ________ studies how to reduce litter.
2. A good neighbor is also one ________ likes to help out in small ways.
3. Many westerners ________ come to China cook much less than in their own countries.
4. Her son, to ________ she was so devoted, went abroad 20 years ago, leaving her alone in the small village.
5. It was a pity that the policeman failed to find the person ________ the witness had described.
6. Studies found that people ________ woke up early for exercise slept better than those who exercised in the evening.