问题
选择题
When ________ about one of the biggest concerns today, many people mention the sharp rise in prices.[ ]
A. asking
B. to ask
C. having asked
D. asked
答案
答案：D
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When ________ about one of the biggest concerns today, many people mention the sharp rise in prices.[ ]
A. asking
B. to ask
C. having asked
D. asked
答案：D