It must have been a very arduous task to build the pyramids. 當時建造金字塔肯定是件萬分艱鉅的事。
He made an arduous effort to keep up with the rest of the class. 他努力跟上班上其他同學。
an arduous hill 陡峭的山
(A) articulate 明白的
(B) aromatic 芳香的
(C) arduous 艱鉅的、費力的、努力的
(D) arbitrary 任性的、專橫的
48. Despite his poor academic performanc..-阿摩線上測驗