Very little use was _____ the waste water in the past．

China won Thomas Cup men’s badminton again.—We are all ___________ it.

There was a time ______ I thought my dad didn’t know a thing about being a good father.

I can’t thank you _______ much because without your help I _______ have won the first prize.

What he enjoys _____ great andinteresting. —Yes,____ it’s dangerous.