单选题

Ryan was late for the conference yesterday () the traffic jam.

Abecause

Bsince

Cfor

Dbecause of

正确答案

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答案解析

[解析] 句意:由于交通堵塞,瑞恩昨天开会迟到了。词义辨析。A、B、C均为引导原因状语从句的连接词,而空后traffic jaw是个名词词组,故because of(因为)符合题意。