单选题 The problems themselves are still not truly strategic because the operation of the global environment is not affected and the survival of civilization is not at stake.
【正确答案】 A
【答案解析】at stake意为“冒险的，有风险的”。A选项：冒险。B选项：在审议中的。C选项：被抑制的，不能自由表达的。D选项：坚持，粘在……上。