—_       did he come?—He came to ask for help.

--Teenagers should speak to the old people _________ ?     -- I agree with you.

We don’t believe _____ little children can do ____ much work in such a short time.

Daming didn’t take a photo in the museum. I didn’t,          .

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