People are impressed by the fact that he can ______ faces he has

People are impressed by the fact that he can ______ faces he has seen for only once.(memory)
【正确答案】：memorize
【题目解析】：译文：他只见一次就能记住人，这个事实给人们留下了深刻印象。分析从句的结构，句中缺动词作谓语，且用在情态动词can后，故用memory的动词形式memorize。答案为memorize。