单项选择题

A. Yes, he was.
B. No, he wasn’t.
C. Yes, he called.
D. Yes, he did.
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填空题
When you were six years old, you had 20 teeth. These are called milk-teeth. After you are six, your milk-teeth begin to (11) . They’re making way for a new (12) . As new teeth come in, they cut off the (13) supply to the milk-teeth. After a while, the milk-teeth fall out. By the time you are 25, you should have a whole new set of teeth. And you’ll have 12 (14) teeth. In all, you’ll have (15) teeth in each jaw.
单项选择题
A. Classmates. B. Headmaster and teacher. C. Father and daughter. D. Teacher and student.
A. Classmates. B. Headmaster and teacher.
C. Father and daughter. D. Teacher and student.
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