You can borrow my car you promise not to drive too fast.
A. unless
B. even if
C. in case
D. as lone as
网友回答
A. unless
B. even if
C. in case
(答案→)D. as lone as
解析：句意为：只要你答应不开得太快，你就可以借用我的轿车。B,D选项不符合逻辑；unless 常与not等否定意义词连用。
【考点定位】考查主从句的逻辑关系。unless 除非（主句常有否定词not等）even if 即使（引导让步状语从句） in case 万一 as long as 只要（引导条件状语从句）