听录音,选出你听到的词语。 1. How many (math books / picture-books) _______________ do you have? 2. (May I / Let's go and) _______________ have a look? 3. (Open / Clean) _______________ your book. 4. I can see (thirty-one / thirty-five) _______________ desks. 5. My bag is (heavy / light) _______________.