2. 外语
  3. Since many casual smokers develop lung cancer and many (i)____ smokers do not, scientists believe that individuals differ in the

Since many casual smokers develop lung cancer and many (i)____ smokers do not, scientists believe that individuals differ in the

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问题 Since many casual smokers develop lung cancer and many (i)____ smokers do not, scientists believe that individuals differ in their (ii)____ the cancer-causing agents known to be present in cigarette smoke.
选项 A、heavy…susceptibility to
B、chronic…concern about
C、habitual…proximity to
D、devoted…reliance upon
E、regular…exposure to
答案A
解析 空格(i)：
- 方程等号：and连接平行结构，同义重复。not取反。
- 强词和对应：前文说偶尔吸烟的人得了肺癌，空格(i)和casual根据not取反，体现“不偶尔”吸烟的人不会得肺癌，即“经常”。heavy严重的，chronic长期的，habitual习惯的，devoted挚爱的，regular有规律的。habitual和regular同时包括偶尔和经常两种情况，因此排除选项C和E。A、B、D三项合适。
空格(ii)：
- 方程等号：since表示因果，同义重复。
- 强词和对应：前文说抽烟少的人会得肺癌而抽烟多的人不会得肺癌，individuals同时指代两类人，lung cancer和cancer-causing同义重复，因此空格(ii)和develop取同，体现个体在他们对致癌物导致“患病”方面是不同的(differ)。susceptibility to易受…损害(对)，concern about关注…(错)，proximity to在…附近(错)，reliance upon依赖…(错)，exposure to暴露于…(对)。综合空格(i)，答案选A。
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