结构推理 许多人认为这种药有助于睡眠，而我只能暗自感叹：“要是他们知情就好了。”(all can think, if...only)
【正确答案】Many people think that this medicine helps them sleep, but all I Call think is, "if they only knew."
【答案解析】[翻译指导] 本句中的“药”未指明是药片还是冲剂，所以最好用medicine。另外，if only引导的句子应用虚拟语气。“要是他们知情就好了”也可译成if only they knew the truth.