The little girl is too frightened ____________ a word.
If you don’t work _______ enough, I don’t think your dream will come_______.
Good to see you again. It’s almost three years _______ we met last time.
I _______ keep dogs for protection, but now I keep them as pets.
-They said sorry to me, but I wouldn’t listen.-It is foolish of you _______ others for the mistakes.
We have _________ some organizations to help the poor students in the western areas of China.