问题补充：
Zhu Zhiwen，Overcoat Brother， came here to us in singing for the National Day the other day.
A. join
B. join in
C. attend
D. take part in
答案：
(答案→)A. join
B. join in
C. attend
D. take part in
解析：动词辨析。Join sb和某人一起；join in参加活动；attend参加会议/上课；take part in参加活动；句意：朱志文，被称为大衣哥前几天在国庆节的时候来这里和我们一起唱歌了。根据句意说明A正确。
