阿摩線上測驗
4. Although the chemical sounded dangerous, it was actually ___ in small quantities and posed no threat to human health.
(A) caustic
(B) innocuous
(C) scrupulous
(D) vigilant
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統計： A(0), B(9), C(0), D(0), E(0) #3854406
統計： A(0), B(9), C(0), D(0), E(0) #3854406
