单选题 The old artist is in the habit of going for a walk in the park every morning except it rains.
A. in the habit of
B. going for
C. morning
D. except it rains

【正确答案】 D

【答案解析】应改为except when it rains。except后面要加名词或从句。加名词时直接接名词，而加从句时则要加上连词，比如that或者其他。在这里是时间状语从句，故用when引导。