________ nobody gave him any help, he must have done the Wap版

试题详情及答案解析

________ nobody gave him any help, he must have done the research on his own.

A．Now that	B．Although
C．Though	D．For

答案：A

试题分析：考查状语从句连词辨析。A既然；B/C尽管；D由于，因为（所引导原因状语从句放在句末，表示补充说明）；句意：既然没有人帮助他，他不得不独自完成这项研究。根据句意可知上下文之间存在着因果关系，故A正确。
考点：考查状语从句连词辨析