While previewing his lessons, the little boy will make a question mark there is a question.
A. where
B. when
C. because
D. which
网友回答
(答案→)A. where
B. when
C. because
D. which
解析：考查地点状语从句：句意：当预习功课的时候，小男孩在有问题的地方划个问号。Where引导地点状语从句相当于at the place where“在…地方”，选A。