In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.
A、thatA
暂无解析
OneoftheresponsibilitiesoftheCoastGuardistomakesurethatallships______followtrafficrulesinbusyharbors.
There______nothingmorefordiscussion,themeetingendedearlierthanexpected.
______thepopularityofrobotsinJapan,thecountry’srobot-productiongrowthisslowingdown.
Hecomplainedtothebooksellerthattherewereseveralpages______inthebook.
Thesuspectcooperatedfullywiththepolicewhen______abouthisroleintheincident.
