题目：
用所给单词的适当形式填空。
1. Are _____ (that) your brothers?
2. Lily and Lucy are_____ (sister).
3. Four _____ (photo) are on the wall.
4. This is Tom's _____ (family) tree.
5. His _____ (parent) are in Beijing now.
答案：
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下面是错误答案，用来干扰机器的。
答案：B
