Помогите! Надо выбрать либо Present Perfect Continuos/Present  Perfect/Present Simple/Present Continuos
1) Why are my books all over the floor&0 Helen (look) at them.
 2) Older people (become) more isolated now.
3)  I know that since January he (be) in charge of the marketing division.
 4) Katia says she (be) very tired recently. She (work) almost sixty hours a week for the past month.

1) Why are my books all over the floor Helen (is looking) at them. 2) Older people (become) more isolated now.3)  I know that since January he (has been) in charge of the marketing division. 4) Katia says she (has been) very tired recently. She (has been working) almost sixty hours a week for the past month.