Jack, can you tell me how to use the digital camera—______. Let me have a look.

下列句子中加点的成语的使用，不恰当的一句是（ ）

Internet users are warned to be ________ about giving away personal information to strangers.

Thanks a lot for supporting us in the match. —____________.

rade caused me $500 worth of loss –Pity! You didn’t listen to my advice;otherwise, you _________