题目

Complete the sentences with the correct form of the words and expressions below.alter constitute emission privacy at best1. The automobile industry is one of the largest producers of greenhouse gas _______.2. According to the doctor, the pills are _______ ineffective and at worst dangerous.3. These days, it is so easy to _______ the appearance of a photo or video that it is hard to know if what it shows is real.4. Younger generations seem less concerned about their _______ than those who grew up without social media.5. People under the age of 40 _______ the majority of the subjects in the recent scientific study.

Complete the sentences with the correct form of the words and expressions below. alter constitute emission privacy at best 1. The automobile industry is one of the largest producers of greenhouse gas _______. 2. According to the doctor, the pills are _______ ineffective and at worst dangerous. 3. These days, it is so easy to _______ the appearance of a photo or video that it is hard to know if what it shows is real. 4. Younger generations seem less concerned about their _______ than those who grew up without social media. 5. People under the age of 40 _______ the majority of the subjects in the recent scientific study.

题目解答

答案

我们来逐句分析并完成这个填空题，使用提供的词汇并用正确的形式填入句子中。 提供的词汇是： **alter, constitute, emission, privacy, at best** --- **1. The automobile industry is one of the largest producers of greenhouse gas _______.** 分析： “greenhouse gas”（温室气体）后面需要一个名词，表示“排放物”。**emission** 是“排放”的意思，且“greenhouse gas emissions”是一个常见的固定搭配，表示“温室气体排放”。 注意：这里需要的是名词的复数形式，因为说的是“最大的生产者之一”，意味着排放量大，通常用复数。 正确答案：**emissions** ✅ 句子：The automobile industry is one of the largest producers of greenhouse gas **emissions**. --- **2. According to the doctor, the pills are _______ ineffective and at worst dangerous.** 分析： 句子结构是“at worst dangerous”（充其量是危险的），前面应该是对称结构“at best ineffective”（最好的情况是无效）。 “at best” 是一个固定短语，意思是“充其量，至多”。 所以这里应填入：**at best** ✅ 句子：According to the doctor, the pills are **at best** ineffective and at worst dangerous. --- **3. These days, it is so easy to _______ the appearance of a photo or video that it is hard to know if what it shows is real.** 分析： 这里需要一个动词，表示“改变”照片或视频的外观。提供的词中，**alter** 意思是“改变，修改”，符合语境。 句子结构是“it is easy to do something”，所以后面接动词原形。 正确答案：**alter** ✅ 句子：These days, it is so easy to **alter** the appearance of a photo or video that it is hard to know if what it shows is real. --- **4. Younger generations seem less concerned about their _______ than those who grew up without social media.** 分析： 这里需要一个名词，表示“隐私”。**privacy** 是不可数名词，意思是“隐私”，符合句意。 “be concerned about their privacy” 是常见表达。 正确答案：**privacy** ✅ 句子：Younger generations seem less concerned about their **privacy** than those who grew up without social media. --- **5. People under the age of 40 _______ the majority of the subjects in the recent scientific study.** 分析： 这里需要一个动词，表示“构成，组成”。提供的词中，**constitute** 意思是“构成，组成”，符合句意。 主语是“People under the age of 40”，复数，时态为一般现在时，所以动词用原形。 正确答案：**constitute** ✅ 句子：People under the age of 40 **constitute** the majority of the subjects in the recent scientific study. --- ### 最终答案： 1. **emissions** 2. **at best** 3. **alter** 4. **privacy** 5. **constitute** \boxed{ \begin{aligned} &1.\ \text{emissions} \\ &2.\ \text{at best} \\ &3.\ \text{alter} \\ &4.\ \text{privacy} \\ &5.\ \text{constitute} \end{aligned} }

解析

  1. 考查名词搭配：greenhouse gas后需接名词，表示“排放物”，需用emission的复数形式。
  2. 固定短语对称结构：与“at worst”对应，需填入at best。
  3. 动词选择：表示“改变”需用alter，句型为“it is easy to do”。
  4. 抽象名词：表示“隐私”需用不可数名词privacy。
  5. 动词主谓一致：主语为复数，需用constitute的原形。

1. The automobile industry is one of the largest producers of greenhouse gas _____.

关键点：

  • 固定搭配：greenhouse gas emissions（温室气体排放）是常见表达。
  • 名词复数：emission表示“排放物”，此处需用复数形式。

2. According to the doctor, the pills are _____ ineffective and at worst dangerous.

关键点：

  • 对称结构：句中“at worst”对应“at best”，表示“充其量”。
  • 固定短语：at best ineffective（最好的情况是无效）。

3. These days, it is so easy to _____ the appearance of a photo or video that it is hard to know if what it shows is real.

关键点：

  • 动词选择：alter表示“修改、改变”，符合“改变外观”的语境。
  • 句型匹配：it is easy to do something（做某事很容易）。

4. Younger generations seem less concerned about their _____ than those who grew up without social media.

关键点：

  • 抽象名词：privacy表示“隐私”，不可数。
  • 固定搭配：be concerned about privacy（关心隐私）。

5. People under the age of 40 _____ the majority of the subjects in the recent scientific study.

关键点：

  • 动词含义：constitute表示“构成”，主语为复数，用原形。
  • 主谓一致：people是复数，动词用原形。