Question

He _______ foreigners in his cafe before, so he didn’t know how to serve the American family.

1. A.
   had rarely had
2. B.
   had had rarely
3. C.
   rarely had
4. D.
   had rarely

Answer 1

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。