第三部分 英语知识运用（共两节，满分45分）
第二节（共10小题：每小题1.5分，满分15分）
阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Have you ever heard about climate change or global warming? Does it sound (61) ________ bit confusing when you first hear it? Well, we’re going to make it easy for you (62) ________ (understand) exactly what climate change is.
There have been lots of rumblings (传闻) about how our climate is changing. Scientists are always warning us that these changes (63) ________ (happen) right now, and that they’re harming living and non-living things on Earth. For example, there are places (64) ________ it used to be really cold but now it is getting (65) ________ (warm). This is called global warming.
From 1880 to 2012, the global average (land and ocean) surface temperature increased (66) ________ 0.85℃. The amount of rainfall has risen in certain parts of the world since the (67) ________ (begin) of the 20th century. Actually, it (68) ________ (believe) that sea levels have gone up by about 19cm across the entire world with lots of icy glaciers melting.
Global warming causes land and water to expand (69) ________ (gradual), and it also causes ice sheets to melt. When lots of ice melts, it becomes water and then goes into streams, rivers, lakes and seas. This means that our water (70) ________ (level) are rising, which could cause floods.
