单项选择题

Modern medicine and new methods of food production allow adults to live longer and babies to ______ , not die soon after birth.

A. survive
B. grow up
C. exist
D. develop
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You ______ take your tools in case some machines need repairing.
A. had better
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C. would better
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单项选择题
The street was named ______ the hero who gave his life for the cause of the people.
A. after
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