He is so busy. He cannot afford enough time with his son he wants to.
A. even if
B. as if
C. because
D. before
网友回答
(答案→)A. even if
B. as if
C. because
D. before
解析：句意：他很忙。他即使想腾出足够的时间陪他的儿子却也不能。根据句意，从句为让步状语从句，故用even if（即使）。As if（好像）引导方式状语从句；because（因为）引导原因状语从句；before（在…之前）引导时间状语从句。
【考点定位】考察状语从句引导词用法。