Поставить глаголы в скобках в нужном времени.

1) By this time next year you (to graduate) from the University.
2) All last week he (to prepare) for the examinations.
3) That man (to teach) at the University since 1985.
4) Water (to change) into ice when the tempreture (to drop) below zero.
5) Kindly repeat what you just (to say).
6) I only (to succeed) in solving the problem after I (to work) on it for several hours.
7) He reminded me that we (to be) classmates at school.
8) I (to hear) that you (to give) up the idea of learning English.
9) By the time he (to be) thirty he (to become) a good engineer.
10) My friend (to go) to Moscow last summer and he (to work) there since then.
11) When I (to get) back they probably (to work) at the computer.
12) When I (to go) to the library the next day I (to find) the book exactly where I (to leave) it.