be tired out疲倦极了
be true of适用于
be unequal to无法胜任的
be united as one团结一致
be used as被用作
get used to习惯于
be well up in精通,熟悉
be mad about迷恋
be good for适于,在期间有效
be identified as被认为是
be indispensable for对必不可少的
be involved in包括中,被卷入
be kind enough to承好意,恳请
be known to为所熟知
be likely to可能要,像是要
be made from由制成
be made of由制成
be mixed up混杂,混在一起
be obliged tmfor因而感激
be pleased to乐于
be popular with得人心的,受欢迎的
be willing to乐意
be worse off处境较坏,情况恶化
be divided by被除
be eager for渴望
be engaged in忙于,从事于
be famous for以着名
be filled with充满
be fond of喜欢,爱好
be friendly to对友好
be glad to乐于,对感到高兴
be good at善于,擅长