In 1900, the energy derived from burning petroleum was only four percent ______ of coal.
A、thatA
暫無解析
Notallbirdscanfly,______doallbirdsbuildnests.
Ifyou’resittingaroundalonelycampfireatnight,thehowlofawolfcansoundpretty______.
Whilecrossingthemountainarea,allthemencarriedgunslestthey______bywildanimals.
Mr.Johnson______rathernotinvestthatmoneyinthestockmarket.
Theproposaldeservessupportasitgives______totheneedsofchildren.
