We can see a lot of people doing morning exercises in the park even______a cold morning.

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问题 We can see a lot of people doing morning exercises in the park even______a cold morning.

选项 A、on
B、in
C、at
D、during

答案A

解析 本题考查介词辨析。一般表示在某个具体日子或时段,用介词on。故选A。
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