Помогите, надо поставить в правильную форму причастие в скобках
1. During the experiment the scientists used the latest methods.
(to recommend)
2. Journalists (to take part) in the press- conference are admitted
by a special pass.
3. The paper described a series of carefully (to control) experi-
ments.
4. There is a (to grow) demand for the kind of information (to
give) in the advertisement.
5. (to pass) the examinations successfully students enjoyed their
summer holidays.
6. People (to study) foreign languages can acquire good know-
ledge if they have regular conversational practice.
7. They carried out their investigation (to use) the best modern
devices.
8. (to send) on business to London my friend hoped to improve
his language.
9. (not to know) of their arrival I could not meet them at the
railway station.
10. Telegrams (to send) at the night time must be paid for with
a reduced charge.
1. (to ask) a particular personal question he felt confused.
12. Though (to retain) an interest in theoretical physics the young
scientist began investigating the problem of practical application
of some physical laws.