Notuntiltheearlyyearsofthe19thcentury
問題詳情：
Not until the early years of the 19th century______ what heat is.
A. did man know B. man had known C. man knew D. had man known
【回答】
A
知識點：倒裝與省略
題型：選擇題
問題詳情：
Not until the early years of the 19th century______ what heat is.
A. did man know B. man had known C. man knew D. had man known
【回答】
A
知識點：倒裝與省略
題型：選擇題
