第一步：用自己平时的设备阅读 Step 1: Read on your usual device
如果你主要用手机，就用手机查看题干、选项和解释：字号是否看得清，长句是否需要反复左右移动，按钮是否容易点到。先用真实使用场景判断，而不是只看宣传截图。
If you usually study on a phone, check the question, options and explanation on that phone. Is the text readable? Do long sentences require sideways scrolling? Are buttons easy to tap? Judge the experience in your real study setting.
第二步：看看语言对照是否帮得上忙 Step 2: Check whether language support helps
选一段自己容易卡住的英文，先读一遍，再切换语言或查看对照。留意对照内容是否帮助你理解原来的条件，而不只是让你更快选出答案。
Read a passage you find difficult, then switch languages or use the parallel text. Check whether it helps you understand the original conditions instead of merely choosing an answer faster.
CACLT PREP 提供中文、英文和中英双语显示，可以按自己的阅读习惯选择。
CACLT PREP offers Chinese, English and bilingual display modes so you can choose the format that suits your reading.
第三步：体验答题后的反馈 Step 3: Try the feedback flow
完成一次公开样题练习，看看结果出现在哪里、解释怎样阅读、怎样返回其他页面。只看入口，不实际走一遍，很难判断自己是否愿意经常使用。
Complete a public sample session and check where results appear, how explanations are presented, and how to return to other pages. Walking through the flow is more informative than looking only at the entry screen.
第四步：核对免费与付费的边界 Step 4: Check what is free and what is paid
本站公开精选样题无需注册，用于体验答题方式，不等于获得整套课程试用。完整 B 类与 C-10 课程按类目分别购买；具体价格、权限和购买规则以账户页面及购买说明为准。
Public selected samples on this site require no registration and demonstrate the practice format. They do not provide a trial of the entire course. Full B and C-10 courses are purchased separately by category; check the account page and purchase terms for pricing and access.
不要用一道样题推断所有章节的质量，也不要把模拟练习成绩当成正式考试结果。可以先确认功能合适，再了解课程范围和支持方式。
One sample cannot establish the quality of every chapter, and practice scores are not official exam results. First assess the interface, then review course scope and support options.