问题补充：
--- What are your plans for the coming weekend?
--- I have to at home. You know there will be an important exam next week.
A. look after my sister
B. go over my lessons
C. help with the housework
D. turn on the radio
答案：
A. look after my sister
(答案→)B. go over my lessons
C. help with the housework
D. turn on the radio
解析：句意：下周你的计划是什么？我得在家复习功课。你知道下周有一个重要的考试。look after my sister 照顾我的妹妹，go over my lessons复习功课，help with the housework帮助做家务，turn on the radio打开收音机。根据there will be an important exam next week下周有一个重要的考试，可知选B.
