8. Paranasal sinusitis is an infection of the _______.
(A) inner ear
(B) throat
(C) lymph nodes in the neck
(D) sinuses around the nose
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統計: A(12), B(17), C(33), D(375), E(0) #1814819
統計: A(12), B(17), C(33), D(375), E(0) #1814819