【题目】Only after being attacked by the Japanese in Pearl Harbor ________in the Second World War thoroughly.
A. had America involved B. was America involved
C. America had involved D. America was involved
在线课程【答案】B
【解析】
试题分析：考查部分倒装；句意：只有当日本袭击了珍珠港美国才参与了二次世界大战；only +状语从句+部分倒装，be involved in 参与，故选B项。