说明
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It is important that enough money ____ to fund the project. A. be collected B. must be collected C. was collected D. can be collected(全国四级,97.1-45)
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It is essential that these application forms ____ back as early as possible. A. must be sent B. will be sent C. are sent D. be sent(全国四级,00.1-64)
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It is of the utmost importance that you ____ here on time. A. be B. shall be C. are to be D. must be(全国六级,95.6-45)
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It's essential that people be psychological able to resist the impact brought about by the transition from planned economy to market economy. (全国研考,96-12)
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It is absolutely essential that William ____ his study in spite of learning difficulties. A. will continue B. continued C. continue D. continues(全国英语专业四级,07-65)