问题描述：
I'm going to ___ ___ ___（观光） with my parents on Sunday.My father is ___ ___（在工作）.
I'm going to ___ ___ ___（观光） with my parents on Sunday.
My father is ___ ___（在工作）。
I'm going to ___ ___ ___（观光） with my parents on Sunday.
My father is ___ ___（在工作）。
问题解答：
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