____ there a teacher —- No, ____.

I went to the live concert yesterday and didn’t know what happened in the school.— ____________ .

y hand-held Reader, I’ve read more booksin the past six months than I ________ in the past six years.

Technology has quickened the rate _________ wecommunicate with the world around us.

下列各句中，没有语病的一句是（　　）