搜题，就来5TiKU.com题库【问题】 He was reading his book, completely（） to the world.
He was reading his book, completely（） to the world.
A.lost
B.to lose
C.to have lost
D.losing
正确答案：A
题目解析：暂无解析，丰阳塔题库将尽快完善。
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