he was running downstairs_____he slipped and fell to the ground,_____.

he was running downstairs_____he slipped and fell to the ground,_____.
a.as, unconsciousb.while, unconsciously c.when, unconsciousd.when, unconsciously
英语人气:968 ℃时间:2019-12-18 04:44:24
优质解答
C
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