Iwaswatchingtheclockallthroughthemeeting,asIhadatrain

问题详情：

I was watching the clock all through the meeting, as I had a train ______.

A. catching                                B. caught                       C. to catch                              D. to be caught

【回答】

C

【解析】

试题分析：句意：在整个会议期间我一直在看钟表，因为我要去赶火车。根据上文判断出as引导原因状语从句，Sb have sth to do 某人有某事要做（在本句中to do 由主语完成），根据句意判断选C。

知识点：非谓语动词

题型：选择题