Ⅳ 单词拼写(共10小题,每小题1分，共10分)
请根据首个字母或汉字写出单词.
56. He hasn’t told me anything about his plan so we are in complete i_________ of it. 57. The p_________ of a trap is to catch and hold animals. 58. She looks young, but she's a_______50.
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