. ---Isn’t it time you __________down to _________ your own things?---I’m sorry for the delay, Dad.

The fire         the death of twenty persons was caused by his carelessness.

I didn’t quite ________ what you said, could you explain it again?

What we need to settle in this area now is how to ________ all the hyacinth (水、葫蘆), which can make the water dirty.     

 As is known to us all, failure usually _______ laziness while diligence can ______ success.