Before petroleum______, another way has to be found. A. takes out B. runs out C. makes out D. works
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Beforepetroleum______,anotherwayhastobefound.A.takesoutB.runsoutC.makesoutD.worksBeforepetroleum____
Before petroleum______, another way has to be found. A. takes out B. runs out C. makes out D. works
Before petroleum______, another way has to be found. A. takes out B. runs out C. makes out D. works
Before petroleum______, another way has to be found. A. takes out B. runs out C. makes out D. works
b
B.用完