I entered he was in his book and didn’t notice me.A. When; devotedB. While; absorbedC.

问题补充：

I entered, he was in his book and didn’t notice me.

A. When; devoted

B. While; absorbed

C. When, absorbed

D. While, devoted

答案：

A. When; devoted

B. While; absorbed

(答案→)C. When, absorbed

D. While, devoted

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