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. - Почему мои книги по всему полу? Хелен смотрит их.
 2) Older people become more isolated now.- Пожилые люди становятся все более изолированными сейчас.
3)  I know that since January he has been  in charge of the marketing division. - Я знаю, что с января он  начальник отдела маркетинга.
 4) Katia says she has been very tired recently. She worked (или has been working) almost sixty hours a week for the past month. - Катя говорит, что она очень устала в последнее время. Она работала почти шестьдесят часов в неделю в течение месяца.

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.