Chemicalsalsostayinthegroundandundergroundwaterforalon...
問題詳情:
Chemicals also stay in the ground and underground water for a long time, ______affects crops and, ________, animals and humans.
A. this; however B. that; therefore C. which; therefore D. which; so
【回答】
C
知識點:定語從句
題型:選擇題