She owns a lot of books, most of _____ are written in English. 

— Would you please join us in this computer game?— Thank you, but I’d rather________.

We've got two TV sets, but we still can't watch anything because ______ works properly.   

Mother told me in a phone call that she had written to me a week before, but I haven’t received__________.

In American there are more households(户主) with pets than ____ with children.