Mr.Brown |knows about| Chinese history.the underlined words mean___BA.thinks about B.learns C.asks about D.talka about很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,...我打错了，B应该是learns about为什么选B？learn有学习，学会的意思，跟know的意思相近