2. 外语
  3. His recommendation that Air Force (investigates) the UFO sighting (was) approved (by the commission) and referred (to) the appro

His recommendation that Air Force (investigates) the UFO sighting (was) approved (by the commission) and referred (to) the appro

admin2011-06-29  73
问题 His recommendation that Air Force (investigates) the UFO sighting (was) approved (by the commission) and referred (to) the appropriate.
选项 A、investigates
B、was
C、by the commission
D、to
答案A应改为(should)investigate。
解析 同位语从句修饰recommendation，从句用虚拟语气。
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