【正文】
fields are below the plane. 所有那些田地都在飛機(jī)下方。 ? Now the bridge is under the plane. 現(xiàn)在這座橋處于飛機(jī)正下方。 ? The story is told in three parts. 這個(gè)故事分 3個(gè)部分。New words text Think about it Let’s do it explanations New words ?sunlight n. 陽光 ?feed v. 喂養(yǎng) ?billion n. 十億 Think about it ? How many plants do you think there are in the world? ? How many plants can you name? ? Why do plants have flowers? How many parts do plants have? ? A plant has four parts: flowers, leaves and stem grow above ground. Roots grow below ground. What do root do? ? Roots bring water from the ground to the plant. What is the stem for? ? The stem carries the water from the roots to the leaves and flowers. ? The stem holds the leaves and flowers in the sunlight. ? Leaves make food for the plant. Why do plants have flowers? ? Is it because flowers are beautiful? No! plants have flowers because the flowers make seeds. New plants grow