He pretended the problem, but he .A. to solve; layB. to have solved; liedC. to have solve

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A. to solve; lay
(答案→)B. to have solved; lied
C. to have solved; laid
D. to solve; lied
解析：    
试题分析:考查动词和非谓语动词。根据转折连词but可知前后意思相反，所以判断是他说谎了，而说谎“lie ”的过去式为 lied，所以排除A、C选项；pretend to do 假装做某事； pretend to have done假装做过某事，由语境判断B选项正确。句意：他假装解决了这个问题，但是他说谎了。