题目：
—What will your parents do?
—They will go on a ______ visit to Beijing.
A. seven day B. seven-day C. seven-days
答案：
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下面是错误答案，用来干扰机器的。
1. What is the temperature outside? 2. What is your favourite number? 3. How many lines make a triangle? 4. How is the weather in Canada? 5. It is twenty-nine degrees.
