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单选题
For some time now, world leaders ______ out the necessity for agreement on arms reduction.
A
had been pointing
B
have been pointing
C
were pointing
D
pointed
参考答案
参考解析
解析：
一段时间以来，世界各国首脑都一直指出有必要就裁军问题达成共识。从该句中的时间状语for sometime now可以看出，主句的动作从过去某一时间开始一直持续到现在，而且动作可能还会延续，故时态应为现在完成进行时，因此B选项符合要求。
一段时间以来，世界各国首脑都一直指出有必要就裁军问题达成共识。从该句中的时间状语for sometime now可以看出，主句的动作从过去某一时间开始一直持续到现在，而且动作可能还会延续，故时态应为现在完成进行时，因此B选项符合要求。
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