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外语
Some people view the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remai
Some people view the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remai
admin
2014-03-22
75
问题
Some people view the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remains______.
选项
A、to be shown
B、to have shown
C、to have been shown
D、being shown
答案
A
解析
remain to be shown“尚待揭示”,不定式的一般式表示要实现的情况,其完成式表示已发生的情况。remain doing“保持……;一直……”,如:He remained standing for one hour.他一直站了一个小时。
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