主題：Moon and Sun

班級：S-4

單字：object, orbit, rotation, phases of the moon, sunrise, shadow, satellite, planet, moon, sunset.

句子：

1. When the earth tilts towards the sun, is it day or night? It is day.
2. What is mode when an object blocks the sun's light? A shadow is made
3. What is the star at the center of our solar system called? The sun.