Professor Johnson is said _____ some significant advance in his research in the past years.
A、havingmadeC
暂无解析
Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.
To obtain a satisfactory result ， one must apply two____of paint on a clean surface.
LastMarchthe__________ofa19thcenturycargoshipwasfoundbyanunderwaterarchaeologicalteam.
_____,hecannowonlywatchitonTVathome.
Of course，（）most immigrants did not get rich overnight ， but the of them were eventually able to improve upon their former standard of living.
