2. 外语
  3. It is true that there are still abundant reserves of metals which have not yet been______, but it is necessary to take steps to

It is true that there are still abundant reserves of metals which have not yet been______, but it is necessary to take steps to

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问题 It is true that there are still abundant reserves of metals which have not yet been______, but it is necessary to take steps to ensure that alternative materials are substituted whenever possible.
选项 A、utilized
B、mobilized
C、acquired
D、cultivated
答案A
解析 utilize表示“利用”的意思：mobilize意为“动员”，如：Our county’s in great danger；we must mobilize the whole nation．我们正处于严重的危险之中，我们必须把全国人民动员起来。acquire 意为“获得”，如：She acquired knowledge of the English by careful study．她认真学习而精通英语。但acquire knowledge (education)，不说acquire reserve
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