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短文改错

Spring has come with all its beauty! Trees have turned green or flowers can be seeing everywhere. Last Friday, my friends and me went on a spring outing. It was such a great fun! We cycled along the streams and down the paths. It didn't take us long to get the foot of the mountain, when we left our bikes. Then we begin hiking. As we reached the top of the mountain, we were shocking to see many plastic bottle and food bags here and there. All of us started to collect the rubbish and then took it down the mountain. We felt happily to have done our part for the environment.