be long in doing sth

be long in doing sth be interested in doing sth be busy in doing sth be behind in doing sth be sophisticated in doing sth be active in (doing) sth怎样造句 用be slow in doing sth造句 be absorbed in（doing）sth 关于succeed success successfulsuccess in sth.success doing sth.be successful in sth.be successful in doing sth.区别 be worth doing sth .doing前面加in么? 是be interest in doing sth还是be interested in doing sth be excited in doing sth?be excited about doing sth?区别be excited in doing sth和be excited about doing sth区别不是有be interested in?为什么没有be excited in doing sth be successful in (doing) sth.be successful at (doing) sth.如何翻译,有什么区别 be doing sth.when be always doing sth . be doing sth. 急·have success in doing sth=be successful in doing sth=have success in doing sth=be successful in doing sth=do sth with success=do sth successfully吗?还有stand stand up呢？ be important in can't stop doing sth.enjoy doing sth.