阿摩線上測驗
22. _____, the region would become a wasteland, incapable of supporting human settlements.
(A) If such measures were not taken
(B) If such measures have not taken
(C) If such measures take
(D) If such people were taking
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統計： A(384), B(69), C(25), D(10), E(0) #1280184
統計： A(384), B(69), C(25), D(10), E(0) #1280184
