_____ I shouted at the top of my voice _____ turn his head.

If you can’t work out the math problem, you can ask your teacher ___some____.

Are you afraid of__________ out at night—-No, but I’m afraid __________ the strangers at night.

Didn’t you see the sign “No parking !” on the right—-sorry, I didn’t . But now I know parking _____ here.

．Researchers from MIT, Harvard reported a study of human brains yesterday that may______ some new information for mental illnesses.