试题题干
Translate the following sentence into Chinese.
Plants and animals that have been studied carefully (including the human) seem to have built-in clocks.
参考答案
试题解析
考点：study carefully 精心研究；seem to···似乎······；built-in clocks 内在的时钟。
句子结构：主句为Plants and animals seem to have built-in clocks，that引导定语从句修饰Plants and animals。