Read and put the sentences in order. （给句子排序）
（ ）You look sad in this picture. Why?
（ ）Well, look at this picture. You're in bed too, but you look happy. Why?
（ ）Look at these pictures, Lily.
（ ）I was happy because Andy came to see me and helped me with my maths.
（ ）I was sad because I was ill. I had to stay in bed.
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