Everyone goes to plant trees Tree Planting Day. A. on the B. on C. in D. in the——青夏教育精英家教网—

摘要：Everyone goes to plant trees Tree Planting Day. A. on the B. on C. in D. in the

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A. on the 　　　　　　 B. on 　　　　　　　　 C. in 　　　　　　　　 D. in the

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