Respondingto the public’s fascination with-and sometimes undue alarmover-possible threats from asteroids, a scale developed by astronomers rates the likelihood that aparticular asteroid or comet may collide with Earth.
A. a scale developed by astronomersrates the likelihood that a particular asteroid or cometmay
B. a scale that astronomers havedeveloped rates how likely it is for a particularasteroid or comet to
C. astronomers have developed a scaleto rate how likely a particular asteroid or comet willbe to
D. astronomers have developed a scalefor rating the likelihood that a particularasteroid or comet will
E. astronomers have developed a scalethat rates the likelihood of a particular asteroidor comet that may
D为啥错误?develop 。。。 一定要to么? |