六、閱讀理解測驗 (每題2分，共20分)第46-48題 (L8 課本Reading)                                                                      Kepler 32         Far away from Earth, a group of people lived on Kepler 32, a beautiful planet. They were happy during the day, but not at night because there were zombies living underground.         When the sun went down, the zombies came up to hunt people for food. The king of the country led his soldiers to fight back. They shot arrows into the zombies, but they didn't die. They set fire to the zombies, but they weren't scared. After some time, the king and his people gave up. Everyone hid before it got dark, and no one could sleep well.         The princess of the country, Natalie, was a smart young woman. She didn't want to give up. She turned to nature for help and finally found Pollen X. It was safe to people, but not to the zombies because it could kill them quickly.        One windy night, Natalie went to a mountain top with a lot of Pollen X. The zombies smelled her and came for her. Natalie then let out the pollen into the air. In a minute, all the zombies died. Natalie saved everyone.
【題組】46.On Kepler 32, when did the zombies come up from underground?
(A) When they smelled people.
(B) When it got dark.
(C) When it was during the day.
(D) When they saw the sun.