题目内容

________，John returned to school from his hometown.
A．The summer vacation being over
B．The summer vacation is over
C．Because the summer vacation over
D．After the summer vacation being over
A

做题时首先分析句子结构，确定句子类型。此处应为独立主格结构作为主句的原因，对主句解释、说明，故A项正确。B项为完整的句子，两句间缺少连词；C项是because引导的原因状语从句，句中缺少谓语；D项是after引导的时间状语从句，谓语动词应为was。
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