【题目】It took my sister two hours　　　 doing her homework.

【题目】—　　　is the desk made of?

【题目】— Where is my MP5 player, Lucy?

【题目】I decide to lose my__________ (weigh) , so I don't eat any meat.

【题目】I didn't know Jack's address ________ he wrote to me.

【题目】To make our city more beautiful, many trees and flowers are __________ (plant) this year.

【题目】— Need I finish my homework today?

【题目】The boy’s uncle is good at __________(train) dogs. His dogs can do many things.

【题目】It’s very clever ________ him ________ out such a difficult problem.

【题目】It's not safe to tell our __________ (person) information to strangers.