问题
选择题
_____ 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
答案：C
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_____ 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：C