—Be careful not to drop the Ming Dynasty vase.
—Yes，we can’t be ________.
| A．too careful | B．very careful |
| C．too careless | D．careless enough |
This picture was taken a long time ago. I wonder if you can __________ my father.
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I saw Bob play the piano at John’s party and on that __________ he was simply brilliant.
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It is considered no use _________ against the deadly disease.
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He regretted very much __________ unkind things about his friends.
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He __________ starve to death ___________ beg for food on the street.
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