问题
选择题
He _______ foreigners in his cafe before, so he didn’t know how to serve the American family.
A．had rarely had
B．had had rarely
C．rarely had
D．had rarely
答案
答案：A
考查时态。由关键词before可知没有外国人来他的咖啡店发生在第二句之前，应该使用完成时。副词rarely要放在助动词和行为动词之间。句意：以前没有外国人来他的咖啡店，所以他不知道怎么给美国家庭提供服务。