1、His help make it possible for me to finish the work on time.他的帮助使我按时完成工作成为可能.
2、His work has made a difference.他的工作起了作用.
3、I like playing.我喜欢玩.
4、He was excited about having a chance to Beijing.她为能有机会去北京感到兴奋.
differenee应该是difference.encited应该是excited.