2 . 根据语篇内容，用完整的句子回答下列问题。
Oliver: What did you do last weekend?
Sarah: I went to Ping Yuan Lake with my family.
Oliver: What did you see?
Sarah: I saw a big and beautiful lake. The lake water was clear(清澈的). The trees were green. The flowers were colourful. Many birds were flying over the lake. Some children were playing, some parents were talking, and some grandparents were taking pictures…
Oliver: What did you do there?
Sarah: First, I did morning exercises in front of the gate. Then, I went for a walk by the lake. At last, I went camping on the hill.
Oliver: How happy you are!
1. What did Sarah do last weekend?
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2. What did Sarah do by the lake?
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3. Where did Sarah go camping?
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4. Did Sarah do morning exercises behind the gate?
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5. Were there many birds flying over the lake?
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