Frequently single-parent children some of the functions that the absent adult in the house would have served.
A. take on
B. take up
C. take in
D. take after
网友回答
(答案→)A. take on
B. take up
C. take in
D. take after
解析：考查动词短语。take on 披上, 呈现, 具有, 雇用, 承担, 盛气凌人, 接纳。句意：单亲家庭的孩子承担起一些缺席大人的责任，这些如果有成人要由大人承担的。