试题题干
Translate the following sentence into Chinese.
The first thing a dog is taught is to obey. It should not take too long for him to learn commands.
参考答案
试题解析
考点：taught（teach的过去分词和过去式）教；obey服从；command命令。
句子结构：第一句中a dog is taught作first thing的后置定语。第二句it为形式主语，真正的主语为to learn commands.