grave,serious 有什么区别?如题,

grave,serious 有什么区别?如题, serious severe 有什么区别 hare rabbit,grave tomb分别有什么区别? serious severe 有什么区别哪个程度深 cemetery,grave,tomb都是“坟墓”,有何区别? He wished his son to take his duties ______.A.serious B.grave C.seriously D.gravely这道题为什么用形容词而不用副词呢?为什么用serious而不用grave呢 grave什么意思 you are being serious 和you are serious 有什么区别呢?经常看到be+being+adj.形式的句子 tomb和grave的区别? severe,serious,strict,stern有何区别? be serious with/about有什么区别吗?有没有哪个接人 哪个接物的分别? serious与severe都表“严重的”有什么区别希望能举例说明, grave有形容词性吗, be serious about 和be interested in 有何区别 英语-谁能告诉我---这两句话有什么区别原文段：The trail of non-biodegradable litter international tourists leave behind them and the vast amounts of fossil fuel consumed in transportation pose grave environmental threats to the tour serious /strict 区别 serious与severe这两个单词有什么不同? Cars do cause us some health problems--in fact far more serious( )than mobile phones do.( )为什么填ones 而不是those?两者作代词有什么区别?