The crazy fans ________ patiently for two hours, and they would wait till the movie star arrived．
A.were waiting
B.had been waiting
C.had waited
D.would wait
网友回答
B解析从they would wait till the movie star arrived可看出：他们一直在等，并且还要继续等下去。从句中的时态发生于过去，所以用过去完成进行时，强调从过去某一时间开始，一直持续到当时，并且还有可能继续下去。