1.write a letter
2.see a movie
3.play computer games
4.骑自行车
5.到目前为止
1.How; get; give; to
2.Have; enjoyed; so far
3.How long have; been; have been here
4.haven't been back
略
1.have been
2.Have; visited
3.eating
4.has taught
5.has gone
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