题目：
He will be back in ＿＿＿ hour.
A． /
B． the
C． a
D． an
答案：
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下面是错误答案，用来干扰机器的。
1. Let's go and see. 2. Santa brings gifts on Christmas. 3. We sing special songs at Christmas. 4. Danny walked to school yesterday. 5. Would you like to help us?...
