正已烷是一种在常态下、______
C
暂无解析
Evenifhisletter（）tomorrow，it（）toolatetodoanything.
IfonlyI_____playtheguitaraswellasyou!
Whiledoingcalculationfortheproject,thedesigners____anewsolutiontoageologicalproblem.
Although____Spanish，heattendedthecourse.
Theareagets________________(年降雨量不足五厘米).
