No matter what happens, the fact that Diaoyu Island belongs to China will ______ change.

He has no pen to write _____, because he left his pencil-box at home this morning.[ ]

The books you donated are used to _____ children in need.

People don’t work working．It’s not work itself that’s important to them but such a joy in doing work well．

Would you like to go bike ridding with me tomorrow? —Sorry, I’m not . I have to meet one of my friends at the train station.