单项选择题

Modern medicine and new methods of food production allow adults to live longer and babies to （）easier.

A. exist
B. extinct
C. survive
D. revive

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单项选择题
I1. He is quite sure that it's （）impossible for him to fulfill the task within two days.

A. roughly
B. exclusively
C. fully
D. absolutely
单项选择题
As an outstanding scholar, he has become （）to the research team.

A. senior
B. junior
C. indispensable
D. independent
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