Языковеды, помогите, пожалуйста!!! Нужно использовать правильную форму глагола в скобках1)

Языковеды, помогите, пожалуйста!!! Необходимо использовать правильную форму глагола в скобках
1) we (not to buy) it if we do not get the money by tomorrow
2) I (to be) late this morning because i could not find the key
3) I completely forgot that i (to arrange) to see the reporter in the atfernoon
4) this company (to produce) these cars since 1978
5) i (to walk) along the street hen i heard a loud crach
6) biology never (to be) one of my favorite subjects
7) in recent years the company (to put) a lot of money into developing advanced technology