C．forced D．offered

　　10．A.graduation B．movement

　　C．separation D．vacation

　　11．A.would B．should

　　C．could D．must

　　12．A.demanded B．reminded

　　C．removed D．asked

　　13．A.ever B．usually

　　C．even D．never

　　14．A.checked B．took

　　C．cleaned D．put

　　15．A.over B．into

　　C．with D．for

　　16．A.find B．pick

　　C．pack D．hold

　　17．A.talking B．playing

　　C．reading D．watching

　　18．A.before B．if

　　C．while D．as

　　19．A.forgotten B．passed

　　C．left D．lost

　　 20.A.helped B．recovered

　　C．improved D．changed

　　Ⅴ.阅读理解

　　A

　　Based on new analysis, we are rapidly approaching major climate change and the effects on society and the environment could be quite severe. Geographers predict that within the next eighty years, current world climate zones could shift and some could completely disappear. Polar regions will get colder while tropical regions will get even hotter, forcing animals to migrate (迁徙) north.

　　Climate changes like these could lead to the spread of diseases. Tropical storms and hurricanes will not only increase but may also become more intense. If the changes come too quickly, animal and plant species may not be able to adapt fast enough and could disappear.

According to Science Daily, a new study predicts that by the year 2100, many of today's