问题补充：
39.Since she was badly ill, her friend visited her .
A. every other day
B. every each day
C. other every day
D. every two day
答案：
(答案→)A. every other day
B. every each day
C. other every day
D. every two day
解析：every +数词可构成表示周期性的短语：every other day每隔一天； every three weeks每三周（每隔两周）。
