Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .
---Don't put the waste on the ground. ---Oh, I'm very sorry. I ________ the dustbin(垃圾箱) there.
By the time she ________ home, her parents will have prepared some delicious food for her.
---Whose advice do you think I should take? --- ________ .
We were pretty _____ when we learned the _______ fact that an elephant would come to live in our school.
My friend is __________ me but I’m not worried and unhappy.