B．Shore crabs react to electric shocks and seemingly feel pain.

　　C．Shore crabs prefer a dark, tight shelter as their habitat.

　　D．Bright light causes discomfort to crustaceans.

　　解析：选B　推理判断题。根据最后一段中的“They were willing to give up their hideaway in order to avoid the source of their probable pain.”可知，这些食草蟹为了避开可能受到的疼痛来源，会放弃它们原来的藏身处。由此可推知，食草蟹对于电击是有感觉的，似乎会感觉到疼痛。

　　Ⅳ.短文写作

　　(2017·湖北部分重点中学联考)请根据以下提示，并结合事例，用英语写一篇短文。

　　It is universally acknowledged that people cannot succeed or achieve their targets without a strong will and persistence.No one can deny the fact that persistence is the key point in accomplishing one's task.Strong will is a kind of good quality which successful people should own.

　　注意：不得照抄英语提示语；

　　除诗歌外，文体不限；

　　内容必须结合生活中的一个事例；

　　词数不少于120。

　　参考范文：

　　Nothing Succeeds Without a Strong Will

　　It is universally acknowledged that people cannot succeed or achieve their targets without a strong will and persistence. One of the most typical examples is that in the present­day society, a growing number of people give up or fail to quit smoking just because of their poor willpower during the process. A variety of factors may account for this phenomenon as follows.

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