1. -Can I borrow your bike, Jane?
    -Oh, sorry, I have just lent it __________ Mary.
2. Taking good care __________ the earth is everyone's duty.
3. Last week Susan's father bought a new bike __________ Susan.
4. __________ the help of the teacher, he has made great progress.
5. The company is famous __________ the high quality (质量) of its products.