Immigrants have a tendency to specialize in manual-intensive jobs because they are less in the local language.
Adeficient
Bomniscient
Ctransient
Dproficient正確答案
答案與詳解
proficient 意為『熟練的、精通的』,固定搭配 be proficient in something。『less proficient in the local language』=『對當地語言較不精通』,完美呼應移民從事勞力工作的原因。
