Before petroleum______, another way has to be found. A. takes out B. runs out C. makes out D. works

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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

before Before Before long before和before long before 和before long before和before just before ever before comes before Prose before before是什么意思 missing ; before long before,before long,soon before,before soon的区别 before是什么意思 before ciass before troubles before用法 before用法