unpredictive造句

While Rhyolytic Vulcanism did not belong to his portfolio, he could at times explode in a similar, unpredictive manner.
Allergists formerly used skin testing with flu vaccine to predict if receiving the flu shot might be safe, but the results of this type of testing are totally unpredictive and this type of testing should be abandoned.
It's no good to say that the aliens have the technology to hide their evil plot from us; that's still an unpredictive statement .-- talk ) 01 : 38, 7 August 2008 ( UTC)
It's difficult to find unpredictive in a sentence. 用unpredictive造句挺难的