单选题
This retired scientist {{U}}takes on{{/U}} leadership roles with nearly every organization she is part of.
A. assumes
B. opposes
C. pretends
D. desires
A
B
C
D
【正确答案】
A
【答案解析】
[解析] take on：获得，具有，表现出，雇用，从事；assume：假设，具有；oppose：反对；pretend：假装；desire：想，愿望是
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