They were still working in the fields it had got dark.A. even ifB. as ifC. in so far asD.

问题补充：

They were still working in the fields it had got dark.

A. even if

B. as if

C. in so far as

D. so that

答案：

(答案→)A. even if

B. as if

C. in so far as

D. so that

解析：这是even if（即使，纵然）引导的状语从句。