—What’s your impression of the Great Wall?—Wonderful! Once , it can never be forgotten.A.

发布时间：2020-08-16 14:13:13

—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
解析：考查非谓语动词。主语it 之间是动宾关系，应用过去分词，句意：你对长城的印象是什么样的？非常壮观！一旦看了，它将永远不会被忘记。所以选A。
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