如题所述
第1个回答 2007-11-29
be careful doing sth
第2个回答 2007-11-29
be careful about sth.
第3个回答 2007-11-29
be carefull of sth.
第4个回答 2007-11-29
be careful to sth.
be careful about sth.
be careful about sth.