Walking to school is slower than _________ a bus.

________ some teenagers don’t realize is ________difficult life can be after they get addicted to drugs

hen I was at school, I had to learn aTang poem by__________each week.

－Could you look after my daughter for me while I’m away －___________.

对名著《三国演义》《边城》《茶馆》的叙述错误的一项是（ ）