阿摩線上測驗
21. There are heroes who live an ordinary life like us, who do their work _____ by many of us, but who make a
difference on the lives of others.
(A) noticing
(B) unnoticed
(C) to notice
(D) to be noticing
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統計： A(12), B(92), C(15), D(14), E(0) #2064160
統計： A(12), B(92), C(15), D(14), E(0) #2064160
