【题目】He has been in bed ______ he fell off his bike a week ago.
A.even if
B.soon after
C.now that
D.ever since

【答案】D
【解析】考查从句连接词。A即使，引导让步状语从句；B不久之后；C既然；D自从，从那以后。现在完成时+since+含过去时的句子，意为“自从......就......”，故选D项。