31 be busy doing sth 忙于做什么事 be busy with sth 忙于……
32 be careful 当心;小心
33 be different from…… 和什么不一样
34 be famous for 以……著名
35 be friendly to sb 对某人友好
36 be from = come from 来自 eg ：He is from Bejing He comes from Bejing Is he from Bejing ? Does he come from Bejing ?
37 be full of 装满……的 be filled with 充满 eg： the glass is full of water the glass is filled with water
38 be glad+to+do/从句
39 be going to + v(原) 将来时
40 be good at(+doing) = do well in 在某方面善长， 善于……