In order to A(attain) our objective, it is B(essential) that we C(will make) the best use of the limited resources D(available).

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问题 In order to A(attain) our objective, it is B(essential) that we C(will make) the best use of the limited resources D(available).

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答案C

解析 “it is essential that...”中,that从句中要用should do表示虚拟,其中should也司省略。
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