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21) She has never been to London.

22) Haven't you done your homework yet?

23) Mike has already begun writing an essay.

24) He has lost the keys.

25) Police has arrested two men in connection with robbery.

26) He told me his name, but I have forgotten it.

27) 'Is Sally here?' 'No, she has gone out.'

28) I can't find my bag. Hav eyou seen it.

29) Jim is on holiday. He has been to Italy.

30) Have you traveled a lot, Jane?