In the text below some words are missing. Drag words from the box below to the appropriate place in the text. To undo an answer choice, drag the word back to the box below the text.
下面的文本缺了一些词。请把词框里的词拖到文中合适的位置；要撤销选择，把词拖回文本下方的词框即可。
All kinds of predictions may be about get even more difficult to climate change. Though no one is sure what its effects will be, it seems that extreme weather conditions such as storms and hurricanes are to become more common. Such events have far reaching effects on distant weather systems, making general forecasting much harder.
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