. It is still unclear ______ the little boy got the CD player to work.
The success of this project______everyone making an effort.
When______,the museum will be open to the public next year.
—Could you help me change the wheel,sir?—______,madam,which one?
Reading is______good habit.Stick to it,and you'll make______great progress.
I really appreciated______the views of your hometown-Kaili for me.