When you read a book, you'd better make a mark you have any question. [ ] A．at w
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When you read a book, you'd better make a mark ________ you have any question.
[]
A．at whichB．at whereC．thatD．where
试题答案
答案：D
提示：（where引导一地点状语从句，“在有疑问的地方做上一个记号”.） |