I. Selective topics: (40 minutes)1. Which plant is referred to as "pandas in plants"? ()A, silverwood b, money pine c, silver almond d, selenium2. What type of bird is good at hunting field rats and has a great benefit to agriculture? ()A, b, woodpecker c, swallow d, owl3. Green shopping, we should choose to buy。Large packaging commodities; b, small packaging commodities;C. One-time items; d. Commodities with advertising materials。4