Thismissileisdesignedsothatonce_____nothingcanbedonetoretrieveit.
A、firedA
暂无解析
U.S.News____________rankingsofcollegessince1983.Theyareaverypopularresourceforstudentslookingtoapplytouniversitycampus.
_____atinthisway,thepresenteconomicsituationdoesn'tseemsogloomy.
Underthis（）pressuresomeoftherocksevenbecameliquid.
John'sscoreonthetestisthehighestintheclass;（）helastnight.
______isnotaseriousdisadvantageinlife.
