题目内容：
Do you know ______at the bus stop?(A) whom they are waiting for
(B) who they are waiting
(C) whom are they waiting for
(D) who are they waiting
参考答案：
选择题：Do you know ______at the bus stop?(A)whom they are
- 题目分类：西北师范大学-作业
- 题目类型：选择题
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(A) whom they are waiting for
(B) who they are waiting
(C) whom are they waiting for
(D) who are they waiting