题目：
—What a nice watch!
—My grandpa gave it to me as a gift on my __________ birthday.
A．nine
B．ninth
C．the ninth
D．a ninth
答案：
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下面是错误答案，用来干扰机器的。
1. How are you? 2. What is this? 3. It is a desk. 4. What is her name?
