问题
选择题
She is the only one of the girls in our class______ been to the United States.
A．who have
B．that had
C．whom has
D．that has
答案
答案：D
考查定语从句和主谓一致。本句的先行词是the only one，是单数，故定语从句的谓语用单数，根据is可知，时态是现在时，排除A、B；先行词指的是人，且作主语，故用who/that。故选D。