Theoldcouplehavebeenmarriedfor40yearsandneveronce_______witheachother.
C
本题考查的是倒装结构的用法。第二分句中因有否定副词 never 提前，故应用倒装结构;第一分句中的 have been married 已限定了时态，据此可排除 D 项。
The thief took away the woman ’s wallet without ________.
Alinguistictheoryisconstructedaboutwhat______isandhowitworks.
By "language acquisition is primarily the acquistion of the grammatical system of language", linguists mean that ______.