All foreign ________ were advised to leave the country following the outbreak of civil war.

A、nationals
B、professionals
C、national
D、professional

【参考答案】

A
解析：首先看句子的谓语动词是"were"，是复数形式，所以空格处填入的单词也应该是复数形式，因为C选项和D选......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)