33. This liquid is very ______, so it shouldn’t be used near an open fire.
(A)exhaustive
(B)flammable
(C)complimentary
(D)elastic
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統計: A(31), B(201), C(9), D(16), E(0) #2677626
統計: A(31), B(201), C(9), D(16), E(0) #2677626