30.
(A) so the need for artificial light increased
(B) and the artificial light needed increase
(C) the need of artificial light so increased
(D) increased the need for artificial light
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統計: A(1), B(0), C(2), D(1), E(0) #3268203
統計: A(1), B(0), C(2), D(1), E(0) #3268203