1、Bothofthedriverswereinjuredinthecollision.
(A)hindrance(B)cry(C)crash
2、Janet’sjobasanassistantattheHarvardUniversityobservatorywastoclassifystarsaccordingtotheirspectra.
(A)locate(B)photograph(C)categorize
3、Inaerospaceprograms,helium(氦)isusedtochillrocketenginespriortothelaunch.
4、Balletistheatricalentertainmentthatcombinestheartsofdancing,stagedesign,andmusic.
(A)replaces(B)promotes(C)blends