Mary hasn't decided whether to take up tennis, basketball, or .
A. beginning to play football
B. begin to play football
C. beginning playing football
D. to beginning playing football
网友回答
A. beginning to play football
(答案→)B. begin to play football
C. beginning playing football
D. to beginning playing football
解析：连词词组whether..or连两个不定式 to take up和begin两者并列。须保持形式一致，D项表达方式错误。