Помогите плиз срочно!!!)

Question

Помогите плиз срочно!!!)

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Answer 1

1.have you known
2.have you been doing
3.has Charles visited
4.has been learning
5.have been watching
6.Has he studied
7.has never smoked
8.have you been waiting
9.haven't seen
10.has been writing,hasn't finished