Only when one leaves his homeland how much he loves his motherland.
A. he will realize
B. will he realize
C. has he realized
D. he has realized
网友回答
A. he will realize
(答案→)B. will he realize
C. has he realized
D. he has realized
解析：
这题考查倒装句的用法：only+状语从句+主句（倒装句），因为when引导的时间状语从句是一般现在时，所以主句用将来时。选B。