Not until he went abroad to further his study the importance of English.A. has he foundB.

问题补充：

Not until he went abroad to further his study the importance of English.

A. has he found

Bhe has found

C. did he find

Dhe had found

答案：

A. has he found

B. he has found

(答案→)C. did he find

D. he had found

解析：

这题考查倒装句的用法：not until放在句首时，从句不倒装，主句倒装。由前面的went，可知是过去时，选C。