用所给的正确形式填空。 1. Winter, spring, summer and autumn are ____________ (season). 2. What a hot ____________ (sun) day. 3. The wind ____________ (blow) the ____________ (leaf) off the trees.
【判断题】Thinking Cap Corp. prices its various cap designs at different price levels, ranging from $2.05 to $5.95. This is an example of optional product pricing.