A．revisingB．refiningC．rebuildingD．retrieving
A. revising
B. refining
C. rebuilding
D. retrieving
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The author concludes in the last paragraph that ________.
A. governments have spent lots of time in solving the ageing problem B. population ageing is a hard problem, but it needs to be solved urgently C. people are too busy to solve the population ageing problem D. much time and effort will be lost in solving the ageing problem
根据下列材料，回答 76～80 题
第 76 题 下列对“已经卸任的教育部副部长张保庆”的其他表述方法，最恰当的是（）。
The director had her assistant ________ some hot dogs for the staff members.
A. picked up B. picks up C. pick up D. picking up
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