1.Something destructive could happen to a star that gets too close to a black hole.Which of the following statements is NOT mentioned in the passage?

　　A.the black hole could tear apart the star

　　B.the black hole could trigger a nuclear explosion in the star

　　C.the black hole could dwindle its size considerably

　　D.the black hole could devour the star

　　2。According to the third paragraph，researchers differed from each other in the problem of

　　A。whether nuclear reaction would oecur

　　B.whether the stars would increase its density and temperature

　　C.whether shock waves would occur

　　D.whether the uneven tbrces would flatten the stars

　　3.According to the fourth paragraph，which of the tbllowing is NOT true?

　　A.No nuclear explosion would be triggered inside the star

　　B.The star would be destroyed completely

　　C.Much of the star，s matter thrown by the explosion WOuld be beyond the black holes reach

　　D The black hole would completely devomthe star

　　4。What will happen several months after the explosion of the star?

　　A.The star，s matter will move further away from by the black hole

　　B.the black holes matter will heat up

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