题目内容：
—I wonder why Mr. Brown hasn't showed up at the meeting yet.—I' m not sure, but he ________ in a traffic jam driving here.
参考答案：
答案解析：
单选题：—I wonder why Mr. Brown hasn't showed up at the meeting yet.
- 题目分类：英语三级B级
- 题目类型：单选题
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—I' m not sure, but he ________ in a traffic jam driving here.