close attention is being paid ()for the criminalA.SEARCHING B.TO SEARCH C.SEARCH

B.
首先排除C,因为一个英语句子中只能有一个动词,这里已经有了is,排除C；
其次注意一个常用短语Pay attention to.这里把attention提到句首,所以要加to.故选B
句子可还原为To search for the criminal is being paid close attention.