one children want to challenge themselves by learning a language different from ______ their parents speak at home.

I asked her ______.

I would like to join the school volunteer project, and I often imagine _______. 

--Do you know ______ the soldiers came to Yushu Town? --The roads were badly broken. They had to walk there.

Lily doesn’t know ________ she and her friends can do to help the little boy ________ parents have left their hometown for making money.