单项选择题

A deadly disease has affected these animals.

A. contagious
B. serious
C. fatal
D. worrying
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单项选择题
He achieved success through hard work.
A. reached
B. reaped
C. attained
D. took
单项选择题
It took me exactly a week to complete the work.
A. do
B. achieve
C. improve
D. finish
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