2. 外语
  3. It is essential that we (be) ______ informed of your plans in advance.

It is essential that we (be) ______ informed of your plans in advance.

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问题 It is essential that we (be) ______ informed of your plans in advance.
选项
答案be/should be
解析
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大学英语三级B级

大学英语三级

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