❺解析：考查副词的比较级。sixteen years earlier意为“早在16年前”。

❻解析：考查非谓语动词之动词不定式。莉娜当时摘掉钻戒的目的是做饭，故用动词不定式表目的。

❼解析：考查时态。该句中but后的turned up使用了过去式，search是与之并列的谓语动词，故也应使用过去式。

❽解析：考查get done结构。get swept“被扫掉”。

❾解析：考查定语从句的引导词。分析句子结构可知，空格处所在的句子是定语从句，修饰前面的先行词the garden，且从句缺少地点状语，故用where引导该定语从句。

10解析：考查冠词。a wonder一个奇迹。

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模拟强化

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(2017·四川省泸州市高三四诊)

A team of engineers____1.has_created____(create)a super－thin material that could help keep buildings cool.The team developed the revolutionary new material，____2.which____is very thin and can cool objects even under direct sunlight.The material does not need energy to work____3.nor/neither____does it need water to help keep things cool.The engineers say____4.the____new material could provide an answer to air conditioners，which are expensive____5.to_run____(run)．The material is unlike anything____6.found____(find) in nature.It is just 50 micrometers thick.That's slightly____7.thicker____(thick) than the aluminum foil(锡箔纸)we use for cooking.

The engineers explained how their new material works.They said when it is put on top of something，two things happen.It cools the object underneath by____8.reflecting____(reflect) the sun's rays back into space.At the same time，the material removes the object's own heat and sends that into the air.An engineer said：“We're excited about the opportunity to explore potential uses in different scientific____9.fields____(field)．”Another researcher said：“Just 10 to 20 square meters of this material on the rooftop could____10.nicely____(nice) cool down a house in summer.”

文章大意：本文是一篇说明文，主要向我们介绍了一种比锡箔纸稍厚的可以保持建筑物凉爽的新材料。

❶解析：“A team of engineers ____1____(create)a super－thin material that could help keep buildings cool.”句意为一个团队的工程师创造了一个超薄的材料，可以使建筑物保持凉爽。讲的是过去发生的事对现在产生的影响，故应该用现在完成时，故填

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