根据首字母提示填空。1.Be quiet!The doctor is o____ on a wounded man.2.

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根据首字母提示填空。
1.Be quiet!The doctor is o____ on a wounded man.
2.Every year t___ of foreigners come to visit the Great Wall.
3.The s____ are used by people for sending and receiving messages.
4.I saw her crying under the tree just now.(改为被动句)
请说明原因。不回答请不要乱答。

1 operating ( be doing 正在做某事）2 thousands ( thousands of 成千上万的）3 satellites 人造卫星（人们用卫星来发送和接收信息）4 She was seen to cry under the tree ( by me ) just now. 括号里可要，可不要。
很高兴第一时间为您解答，祝学习进步

如有问题请及时追问，谢谢~~O(∩_∩)O
再问：问一下see do sth和see doing sth的被动语态都是seen to do sth吗？谢谢！
还有，这双鞋昨天被卖了到底用不用sell的被动语态？谢谢！
I ____(ride) my bike alone when something ____(hit) me from behind.
再答： 1 纠正一下，see sb do 被动 sb be seen to do 看到过程

see sb doing 被动 sb be seen doing 看到动作，正在发生
所以第四题应该用 be seen doing

2 This pair of shoes was sold yesterday. 用被动

3 was riding hit ( hit的过去式是原形）
再问：谢谢！期待您下次仍能第一时间帮我答题！
再答：嘿嘿，不客气。
嗯，看到我就回答。

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