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题目内容
（广东开放大学-大学英语2）
He was worried about his mother and walked 回答
A
in the room.
A. up and down
B. down and up
C. here and there
D. there and here
A
in the room.
A. up and down
B. down and up
C. here and there
D. there and here
参考答案
