Beck was ___ very unfamiliar with a few words

Answer:
Valuable
Explanation:
The question is very tricky since you think it's asking about Perrault, but it is in fact, asking what beck (the dog) is. Beck is shown to be very valuable to Perrault. They do in fact seem very reluctant to buy beck due to the prices, but he knows he should get beck since,"..he was "One in ten thousand,"."
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