Doctors recommend that everyone exercise every day, particularly

Doctors recommend that everyone exercise every day, particularly those who spend many hours（ ）sedentary work.
A、to do
B、doing
C、do
D、done
【正确答案】：B
【题目解析】：句意：医生建议每个人每天进行锻炼，尤其是那些工作中需要持久坐着的人。spend doing sth.花时间干某事