You know what, the accident ________ last night was caused by a dog ________ to run across the street．A.happened; tryingB.happening; that triedC.that happened; tryingD.which happened; tried
网友回答
C解析第一个空是定语从句，表示“发生在昨晚的事故。”第二个空是动词-ing形式做定语。表示“正在试图穿越马路的狗”