15. Forty years ago, mankind’s most _____ frontier was overcome when Neil Armstrong became the first man to walk on the moon.
(A) tamed
(B) daunting
(C) devastated
(D) intruding

答案：登入後查看
統計： A(6), B(97), C(32), D(34), E(0) #204135

詳解 (共 1 筆)

#657479

daunting(a.)令人畏懼的 

(D) intruding
       intrude(v.)入侵 
 
3
0