Thismissileisdesignedsothatonce_____nothingcanbedonetoretrieveit.
A
暂无解析
Of course，（）most immigrants did not get rich overnight ， but the of them were eventually able to improve upon their former standard of living.
Modern（）perhaps causes more problems than it solves.
_____ at in this way, the present economic situation doesn't seem so gloomy.