您要查找的是不是：
- When did the pain start? 什么时候开始痛的？
- When does the pain usually occur, before meals or after meals? 通常是什么时候痛,饭前还是饭后?
- But how do we know when do the growing pains stop and the pain pains take over? 但什么时候成长的痛苦会转变成疼痛的痛苦?
- Where did the pain start? 是从哪里开始痛的?
- When do the new safety rules come into force? 新的安全规则何时生效?
- D:When did the vomiting first start? 第一次呕吐是什么时候开始的?
- When did the world come into being? 世界是什么时候形成的？
- When did the empire begin to wane? 那个帝国何时开始衰落的?
- When did the universe come into being? 宇宙最初是何时形成的?
- When does the pain occur? Does it hurt only when you are eating or throughout the day? 疼痛一般发生在什么时候?吃东西的时候痛还是整天痛个不停?
- When do the new semester start< begin>? 新学期何时开学?
- When did the first measurement of the speed of sound take? 第一次测量声速是在什么时候？
- Does the drug take long to act on the pain? 这药是否需要很长时间才能发挥止痛作用？
- When did you first notice the pain? 什么时候开始痛的?
- When does the new law come into operation? 这项新法律何时生效？
- When does the birthday party take place? 生日庆祝会什么时候举行？
- When does the new system become effective? 新制度何时生效？
- When does the plant open? When do we start work? 我们几点开始上班?
- When did the miniskirt go out of vogue? 迷你裙是何时不流行的?
- When does the express train leave? 特别快车什么时候开?
