---What’s your impression of the Great Wall?---Wonderful! Once , it can never be forgotte

发布时间：2020-08-16 14:36:36

---What’s your impression of the Great Wall?
---Wonderful! Once      , it can never be forgotten.
A. seen
B. seeing
C. being seen
D. saw

网友回答

(答案→)A. seen
B. seeing
C. being seen
D. saw
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