单选题
The government is ______ and will take the necessary steps to maintain security and stability.
A、
on standby
B、
at risk
C、
out of control
D、
on the alert
【正确答案】
A
【答案解析】
on standby严阵以待，随时准备着。at risk处境危险。out of control失去控制。on the alert处于戒备状态，保持警觉。
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