2. 外语
  3. It is necessary that the students ____________ (做更多练习).

It is necessary that the students ____________ (做更多练习).

admin2013-02-24  45
问题 It is necessary that the students ____________ (做更多练习).
选项
答案(should) have more exercises to do
解析 此题注意用虚拟语气，主语从句中的谓语用(should)+v.的表达形式。
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大学英语四级

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