题目内容
20．When fish sleep，they often open their eyes．（改为同义句）Fish sleepwith their eyesopen．
分析 --当鱼睡觉时它们常常睁开它们的眼睛．
--鱼睁开眼睛睡觉．
解答 答案：with；open．考查同义句．"当鱼睡觉时它们常常睁开它们的眼睛．"，可以表达为"鱼睁开眼睛睡觉"．用with表示伴随状态，这里指"睁开"眼睛，用形容词open．答案是with；open．
点评 同义句转换最基本的是要保持原意不变，在理解语境的基础上，抓住关键单词或词组，运用相同词意的单词或词组完成试题．
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