In 1900, the energy derived from burning petroleum was only four percent ______ of coal.
A、thatA
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Wehavetowaitforthebus,______?
Whenyoufallinloveforthefirsttime,it’ssurprising______inconveniencesyoucanputupwith.
Iwasshockedbythenumberofpeoplewhoseemedtohavenothingbettertodowiththeirtimethan______toknowfishbetter.
______wecanhopeforistoavoidcompletefailureinthecominggamewiththatstrongteam.
Whilecrossingthemountainarea,allthemencarriedgunslestthey______bywildanimals.
