Mr. Smith, I often hear people say DVD, but I never know what they really mean. Would you tell me what DVD ____?
She heard a terrible noise,__________ made her hair stand on end.
Which of the following is right?
All men ________ by the firefighters so far.
He has ___ few friends that he often feels _____.
Yao Ming is good at playing basketball and he does well in learning foreign languages ____.