How did it______ that humans speak so many different languages?
A．come outB．come offC．come aboutD．come round
C
句意為：人類怎樣會說這么多種語言，這種情況是如何產(chǎn)生的呢？come about發(fā)生；造成；come out出現(xiàn)‘出版；結(jié)果是；come off 脫落；進(jìn)行；達(dá)到效果；come round恢復(fù)知覺；蘇醒過來。
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