7. The lecture was so _____ that many students struggled to stay awake until the end.
(A) tedious
(B) delightful
(C) engaging
(D) concise
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統計: A(62), B(18), C(9), D(5), E(0) #3647467
統計: A(62), B(18), C(9), D(5), E(0) #3647467