已认证怕的不是无路可走，而是怕没有给自己留后路。
关于“考场开始考试”的英语表达，综合多个场景和考试场景的常用语，整理如下：
直接表达
- The exam has started.
- The test has begun.
时间状语表达
- The exam is about to start.
- The exam is starting now.
- The exam will begin shortly.
场景化表达
- The teacher announces, "The exam has begun."
- As the clock strikes the start time, the exam commences.
注意事项：
选择表达时需结合具体场景，例如：
老师宣布时用 "has begun" 或 "is starting"；
自然过渡时用 "is about to start"；
强调时间点时用 "will begin shortly"；
考试开始前可提前告知考生 "The exam is about to start."；
考试开始后需立即停止一切活动并保持安静。
