We are bound to solve the present severe problem, we act intelligently and promptly.
A. even though
B. unless
C. as long as
D. in case
网友回答
A. even though
B. unless
(答案→)C. as long as
D. in case
解析：考查条件状语从句。as long as = on condition that意为“只要”。句意为：只要我们马上明智地采取行动，我们一定能够解决当前的这个紧迫的问题。