——There is _________ “h ” in the word “ hour ” .——I see, but “ h” is silent sound.A. a ; a B. an; a C. an; an
一How long do you do exercise? 一____________.
一Is there ____ bread in the fridge? 一Yes. Would you like _________?
一is Tom’s mother? 一The one in red.
Her father and mother ______ drinking black tea.
There isn’t _______________with your computer.