đổi thành câu bị động xác định rõ tân ngữ how many trees did they cut down to build that fence?
2 câu trả lời
-how many trees did they cut down to build that fence ?
=>How many trees were cut down to build that fence ?
Tree là tân ngữ
How many trees did they cut down to build that fence?
→How many trees were cut down to build that fence?
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Tân ngữ: tree
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