Over the past hundred years, the average life expectancy has ...

★ Word Form & Verb Tense

Over the past hundred years, the average life expectancy has risen _____ from 30 years in 1900 to 67,2 in 2010

A. dramatically

B. drama

C. dramatic

D. dramas

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Studies show that for each hour of _____ exercise, people can gain two hour of additional life expectancy

A. regular

B. regularly

C. irregularly

D. regularity