．You should take __________ measures to avoid danger when doing exercise.

My uncle gave me a ____ bag, in which there was a nice mobile phone as a present.

 I am ______ about the new model, and I firmly believe that there will be a good market for it. 

—Do you have any idea why Mark is leaving?—No. In fact，everyone is _________about it. 

Once he saw his daughter back safe, his ______disappeared.