—That actor often joins in dfferent activities in Beijing. Do you know ?
—For 5 years.
A. how soon he will e back
B. how long he has stayed there
C. how long has he stayed there
D. how often does he go there
网友回答
A. how soon he will e back
(答案→)B. how long he has stayed there
C. how long has he stayed there
D. how often does he go there
解析：考查宾语从句的用法。根据回答“For 5 years”，需要用how long“多长时间”来提问；宾语从句使用陈述语序，确定B正确。