spend ...on(in) doing sth ----------------------------------
spend ...on(in) doing sth ----------------------------------
spend...on(in)doing sth.造句
spend的用法spend 一般不就用在spend on sth 和spend (in) doing sth spend
spend on sth 等于spend doing sth
spend doing sth和spend on sth
spend time (on) doing sth 和spend time (in) doing sth
spend time in doing sth和spend time on doing sth的区别
有spend.on doing sth
spend…on /(in) doing sth.分别造句 配中英文
spend time on sth 和spend time in doing sth 用法和区别
spend time on sth 不必非得加 on/in doing sth
spend doing sth.和 spend on sth.有什么区别?