【題目】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

【答案】B

【解析】句意：只有在珍珠港遭受日本人襲擊之后，美國才徹底卷人第二次世界大戰(zhàn)。only +副詞/介詞短語/狀語從句作狀語，放在句首，主句用倒裝。

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