2. 外语
  3. To understand the situation completely requires more thought than ______. thus far.

To understand the situation completely requires more thought than ______. thus far.

admin2010-04-24  30
问题 To understand the situation completely requires more thought than ______. thus far.
选项 A、has given
B、was given
C、being given
D、has been given
答案D
解析 时间状语thus far“到目前为止”，与现在完成时连用，据此排除B、C。比较从句完整的结构应该是...than the thought which has been given thus far，可以把than看做关系代词在从句中做主语，也可以把主语看做是省了。
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