So far ,China has sent up thousands of.改为被动语态怎么改?

So far ,China has sent up thousands of.改为被动语态怎么改?
So far ,China has sent up thousands of.改为被动语态怎么改?

So far ,China has sent up thousands of.改为被动语态怎么改?
So far ,thousands of (xxx) have been sent up by China.

So far, thousands of satellites have been sent up



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