第7题: [单项选择]In order to (attain) our objective, it is (essential) that we (will make) the best use of the limited resources (available). A. attain B. essential C. will make D. available 参考答案:C 答案解析:虚拟语气用法错误,应改为(should) make。It's essential that...“…是重要的”。在该句型中应使用虚拟语气,其构成是(should)+动词原形,should可省。