1.(2017·天津高考，11，改编)It was when I got back to my apartment ________ I first came across my new neighbors.
答案：that 本句中去掉It was 和空格所填词，句意完整，可以判断本句是强调句型，被强调的是时间状语从句when I got back to my apartment，故填that。
2.(2016·江苏高考，34)Not until recently ________ they encourage the development of tourists-related activities in the rural areas.
答案：did 根据句首的Not until recently可知，本句要用部分倒装形式， 也就是将助动词置于主语前。encourage的动作发生在过去，需用一般过去时。
3.(2015·天津高考，3)Only when Lily walked into the office ________ she realize that she had left the contract at home.
答案：did “only＋状语从句”位于句首，句子谓语需要部分倒装，即将助动词置于主语前。本句是一般过去时，故需在主语前加did。
4.(2015·湖南高考，24)Video games can be a poor influence if ________ (leave) in the wrong hands.
答案：left leave的逻辑主语是video games，两者之间存在被动关系，故需用过去分词表示被动意义。if left是if they are left的省略形式。
5.(2015·湖南高考，31)Always ________ (keep) in mind that your main task is to get this company running smoothly.
答案：keep 分析句子可知本句是一个祈使句，故需用动词原形。
一、强调句
二、倒装句
三、省略句
四、插入语
插入语通常与句中其他成分没有语法上的关系，多用逗号与句子隔开，用来表示说话者对句子所表达意思的情感或态度，对句子表达起修饰、强调、缓和语气等作用。插入语可能是一个词、一个短语或一个句子。掌握插入语不仅有助于正确理解句意，灵活运用插入语于书面表达中还能提高作文的得分。
1．常用作插入语的副词
indeed 的确， surely 无疑， however 然而， obviously 显然， frankly 坦率地， naturally 自然而然地， fortunately 幸运地， strangely 奇怪地， honestly 真诚地， briefly 简单地说， luckily 幸运的是
2．常见的作插入语的形容词或其短语 most important of all 最为重要的是 worse still 更糟糕的是 3．常用作插入语的介词短语
in a few words (或in sum, in short) 简而言之 in his/my opinion 在他/我看来 in other words 换句话说 in a sense 在某种意义上 in general 一般说来 in my view 在我看来 in conclusion 总之 in fact 事实上 in addition 此外 of course 当然
as a matter of fact 事实上 for instance/example 例如
to my joy/delight/satisfaction 使我欣慰/高兴/满意的是 to their surprise/astonishment/amazement 使他们惊奇的是
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