2. 外语
  3. Suppose there were a flood or an earthquake and the people could not be reached by trains or trucks. ______ packages of food cou

Suppose there were a flood or an earthquake and the people could not be reached by trains or trucks. ______ packages of food cou

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问题 Suppose there were a flood or an earthquake and the people could not be reached by trains or trucks. ______ packages of food could be dropped from planes, the people might starve.
选项 A、Until
B、Before
C、Unless
D、If only
答案C
解析 unless“除非”，从主从句的逻辑关系上看，是唯一正确选择。句意为：假如发生了水灾或地震，且火车、汽车又无法通至灾区，除非用飞机空投，否则那里的人们就会挨饿。
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