1. In the background was the eternal hum.
    A. long B. never-ending C. boring D. extensive
    比較:
    You eternal boasting annoys everyone.
    A. unchangeable B. ever-lasting C. boring D. monotonous
    分析: 答案位置沒有變動, 但是被選項(xiàng)出現(xiàn)了近義詞的替換.
    eternal – never-ending – ever-lasting 永遠(yuǎn)的，永久的
    long 長的
    boring – troublesome (B級) 令人厭煩的
    extensive -- wide-ranged 廣