(　　)9. Because no one was in the classroom, 　　　　 I turned the lights off.
(A) so
(B) and
(C) 
(D) but

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統計： A(61), B(8), C(69), D(2), E(0) #369620

詳解 (共 1 筆)

#985463
because為連接詞，此處只有兩句，只能擺一個連接詞。
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