问题补充：
While reading, youd better make a mark you have any questions.
A. on which
B. at where
C. the place where
D. where
答案：
A. on which
B. at where
C. the place where
(答案→)D. where
解析：这是一个定语从句，从句中缺表示地点的状语，所以选D。
500字范文，内容丰富有趣，生活中的好帮手！
时间：2020-08-28 23:19:04
While reading, youd better make a mark you have any questions.
A. on which
B. at where
C. the place where
D. where
A. on which
B. at where
C. the place where
(答案→)D. where
解析：这是一个定语从句，从句中缺表示地点的状语，所以选D。
