【标题与描述分析】：题目和描述提及的是高中英语学习资料，具体是关于"Unit4 Global Warming"的Section IV Grammar & Writing部分的练习题，适用于新人教版选修6。这表明我们要讨论的是与高中英语语法和写作相关的知识点，特别是与全球变暖主题相关的词汇和表达。
【知识点解析】：
1. 强调句型 "It is/was...that/who..."：在给出的句子中，如"It was only when the car pulled up in front of our house that we saw Lily in the passenger seat." 和"You are waiting at a wrong place. It is at the hotel that the coach picks up tourists."，这种句型用于强调句子中的某个部分，例如时间、地点等。这里的"It is/was"后面接被强调的部分，"that"后面是剩下的句子成分。
2. 被动语态：例子如"Bach died in 1750, but it was not until the early 19th century that his musical gift was fully recognized."，"was fully recognized"是被动语态，表示“他的音乐天赋被充分认识”。
3. not until结构：在"It was not until near the end of the letter that she mentioned her own plan."等句子中，"not until"引导的时间状语从句常与主句一起构成倒装，表示“直到...才...”。
4. "It"作形式主语：例如"It was the culture, rather than the language, that made it hard for him to adapt to the new environment abroad."，"It"在这里是形式主语，真正的主语是"the culture, rather than the language"。
5. 动词ing形式作定语："Our exhibits will feed your mind, but what about your body?"中的"feeding"是动名词作定语，修饰exhibits，表示“提供思维食粮的展品”。
6. 一般疑问句式："When was it that you first went to the Great Wall?"是特殊疑问句，使用了"It is/was...that..."的强调句型。
7. 科普教育场所的相关表达：“Visit Pacific Science Center's Store”，“Hungry”和“Rental Information”都是与科学中心相关的信息，包括参观商店、用餐和租赁储物柜等服务。
8. 定语从句："The store is located(位于) upstairs in Building 3 right next to the Laser Dome."中"right next to the Laser Dome"是定语从句，修饰"Building 3"。
以上就是从标题和描述中提取的高中英语语法和写作的相关知识点，包括强调句型、被动语态、not until结构、形式主语、动词ing形式作定语以及一般疑问句式。同时，还涉及到了科普教育场所的服务信息，如商店、餐饮和储物服务。这些知识点对于学习高中英语的学生来说是十分重要的，有助于提升他们的语法运用能力和写作水平。
