阿摩線上測驗
42 Never leave a heater running when you are not at home. Many house fires are attributed to________ use
of heaters.
(A) unsupervised
(B) illustrated
(C) disturbed
(D) exchanged
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統計： A(101), B(16), C(20), D(6), E(0) #2782538
統計： A(101), B(16), C(20), D(6), E(0) #2782538
