It is advised that we (sign) ______ an agreement right after the discussion.

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问题 It is advised that we (sign) ______ an agreement right after the discussion.

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答案(should)sign

解析 虚拟语气可用于主语从句,这类主语从句的一般形式为:It is/was+引起虚拟语气的形容词或过去分词+含虚拟语气的主语从句。这类主语从句常常用于表示要求,建议,命令,请求,提议等,其谓语形式往往为should+动词原形的形式,其中should可以省略。可以引起虚拟语气的形容词和过去分词有:1)形容词:important,necessary,natural,possible,essential,vital,appropriate,imperative,probable, pity,interesting,strange,odd,sorry,surprising,advisable,desirable,urgent等:2)过去分词:desired,advised, decided,required,proposed,ordered,demanded,requested,insisted,arranged,suggested,moved等。
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