12. It was not until the early 21st century _______ of the consequences of global warming.
(A)were people fully aware
(B)people weren’t fully aware
(C)not fully were people aware
(D)that people were fully aware
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統計: A(231), B(94), C(33), D(807), E(0) #980486
統計: A(231), B(94), C(33), D(807), E(0) #980486