Engineers built a canal and implemented irrigation systems to transform deserts into ___ and productive land.
Agreasy
Bfertile正確答案
Cmagnetic
Dprecise
答案與詳解
fertile 意為「肥沃的」,正好與 productive land(高產的土地)呼應,也與前面的 desert(沙漠)形成對比,語意最通順。
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