"Good morning, class," said the teacher on Monday morning.
"Good morning, Sir," replied the students.
"How was your vacation?" he asked.
"It was very good, Sir. We threw lots of snowballs and made a
snowman!"
"So, you enjoyed the snow over the week-end, then" he smiled
at the class.
"Yes, teacher, we had lots of fun," they answered.
The teacher looked around the classroom and frowned. "I see
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