选择你听到的句子。 ( ) 1. A. How much are they? B. How many balls can you see? C. How much is it? ( ) 2. A. I want seven apples. B. I want thirteen oranges. C. I want six bananas. ( ) 3. A. We'll take it. B. I'll take them. C. We'll take them. ( ) 4. A. They're fifteen yuan. B. They're fifty yuan. C. It's fifteen yuan.