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Mr.Green _____(make) a lot of friends since he ___(come)to w

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Mr.Green _____(make) a lot of friends since he ___(come)to work in Wuhan two years ago.
Bob ____(visit) all places of great interest in China since he came to china.
顺便讲讲如何区分 have done 和have been doing 的区别
Mr.Green _____(make) a lot of friends since he ___(come)to w
has made /came
has visited
其实第一个的第一个空填has been making也勉强说的过去...如果答案给的是has been making的话.
have done表示已经做了某事,这件事已经结束
have been doing表示从以前到现在一直在做某,并且有在未来继续做持续下去的可能
如:I have been studying English for seven years.