In 1900, the energy derived from burning petroleum was only four percent ______ of coal.
A
暂无解析
______thepopularityofrobotsinJapan,thecountry’srobot-productiongrowthisslowingdown.
There______nothingmorefordiscussion,themeetingendedearlierthanexpected.
Iwasshockedbythenumberofpeoplewhoseemedtohavenothingbettertodowiththeirtimethan______toknowfishbetter.
Onarrivinghome,theboytoldhisparentsaboutallthe______whichoccurredinhisdormitory.