Is Lingling’s grandmother cooking the meal—No, she 。

Mistakes don’t just happen；they occur for a reason. Find out the reason，and then making the mistake becomes________.

_________ was light bulb invented ________ —Thomas Edison.

I miss my mother very much. She has goneabroad on business for nearly a year but luckily she will be back in a week. —PardonI ______ something else just now. ________ will she come back

Wasn’t it Dr Wang who spoke to you justnow— ____