concern的词组各是什么啊、
<p>问题：concern的词组各是什么啊、<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">韩铁如的回答：<div class="content-b">网友采纳 beconcernedaboutMaryisconcernedabouthermom'shealth.beconcernedwithThepresidentisconcernedwiththedamagescausedbythemassiveoilspilloffthecoastofLouisiana.
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