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Ответ:
1 has been travelling
2 have been looking
3 have been charging
4 have been thinking
5 has been designing
6 has been carrying out
7 has been supplying
8 has been using
9 have been replacing
10 have been looking
11 have been boiling
12 has been studying
13 has been aching
14 have been doing
15 has been playing
Объяснение: