四、閱讀測驗       Winter is cold. Do you know what people do to keep warm? People stay in their houses. But animals dosomething different to live through cold weather. Penguins get together in big groups. When they get together, they staywarm. Polar bears have thick fur to make their bodies warm. Frogs go to sleep in winter. They hide under rocks or inthe ground. Sometimes their bodies freeze! But when spring comes and the weather get warmer, they come back to life.       Some animals leave their homes in winter. They go to warmer places because they cannot live through cold weather.Many kinds of birds and butterflies move in winter for this reason. In autumn, they fly thousands of kilometers to warmerplaces. Some animals don’t move far away. They eat a lot and then find a nice place to sleep all winter. Mice don’t sleep,but they make their nests in warm places. Some bats hang upside down and sleep in dark places for the winter.
【題組】31.What can frogs do in winter?
(A) They get close to each other.
(B) They go to warmer places and make their nests.
(C) They sleep, hide under rocks, and freeze themselves.
(D) They eat a lot and have a nice sleep.