Excuse me，but is that my dictionary?—Oh, sorry, I took________ by mistake.

A Dongying Evening Paper, please! –There is the last one left here, would you like to have ______?

There ______ something wrong with my bike today, so I have to walk to school.

___ we know, in a chemical change, energy cannot be created, ____.

I’m afraid I can only make a small contribution this time.—____.We really appreciate your assistance.