试题题干
Translate the following sentence into Chinese.
When a dog has been properly trained, he will always lead his blind master in the right direction and keep him out of danger.
参考答案
试题解析
考点：be properly trained经过适当的训练；in the right direction正确的方向并；keep···out of danger使······避开危险。
句子结构：When引导时间状语从句，主句为he will always lead his blind master in the right direction and keep him out of danger.