You will succeed in the end you give up halfway.A. even ifB. as thoughC. as long asD. unl

问题补充：

You will succeed in the end you give up halfway.

A. even if

B. as though

C. as long as

D. unless

答案：

A. even if

B. as though

C. as long as

(答案→)D. unless

解析：词义辨析。even if即使，甚至；as though仿佛，好像；as long as只要；unless除非。。。否则，如果不。如果你不半路放弃，最终一定会成功。所以选D。