______ I was walking in the park, I saw a beautiful rainbow in the sky., When, While, Her phone suddenly rang ______ she was reading a book., When, While, ______ we arrived at the party, the guests were dancing., When, While, ______ they were hiking in the mountains, it started to rain heavily., When, While, The lights went out ______ I was cooking dinner, so we had to order pizza., When, While, The people were singing and clapping ______ the concert started., When, While, He was working on his project ______ his computer crashed and he lost all his work., When, While, They were driving to the beach ______ they saw some dolphins swimming in the ocean., When, While, They heard some wolves ______ they were camping in the forest., When, While, The cat knocked over a vase ______ they girl was sleeping., When, While.

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