This field of scientific research remains ____.

A. to be untouching B. being untouched C. to be untouched D. untouched

remain
vi.
保持, 逗留, 剩余, 残存

看到了没? 是个不及物动词,所以可以不接宾语,后面那个分词作形容词做补足语,表示被动
选D
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第1个回答  2007-12-11
D
过去分词表被动
第2个回答  2007-12-11
B
remain+ing形式
第3个回答  2007-12-11
d

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