. Употребить
Perfect, Pest или Future Perfect.


When we came into the hall the
concert already (to finish).
We (to discuss) just the
problems of social relations.
I (to graduate) from a college
before I entered the Institute.
They (to construct) a great
number of new buildings by the end of the year.
He apologized because he (to
cause) so much trouble.
I hope I (to receive) a reply by
tomorrow.
You ever (to visit) Great Britain?

This famous laboratory always
(to play) an outstanding role in training physicists.
He remembered that he (to be) at
that plant before.
I cannot deliver a lecture now
as I (to leave) my papers at the office. 
Очень срочнооооооо!!!! Прошууу!!!! Помогите!!!

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