—Could you please do ________ for me, Jim?  —Yes, with pleasure. 

I want to buy a car for my father, but haven’t found         he likes yet.

To save class time, our teachers has _____ students do half of the exercise in class and complete the other half for our homework.

I want to be a volunteer some day. I feel _____ is my duty to help others.

---How many students have visited Yangzhou Museum?  ---____