问题
选择题
My brother often __________ my mum ________ the house on Sunday.[ ]
A. help; cleans
B. help; clean
C. helps; clean
D. helps; cleans
答案
答案：C
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My brother often __________ my mum ________ the house on Sunday.[ ]
A. help; cleans
B. help; clean
C. helps; clean
D. helps; cleans
答案：C