Условие:
Put the verb in brackets in the right form of Participle I or II.
In the year 2000 the percentage of houses (to supply) by heat from district heating in some European countries was very high.

Put the verb in brackets in the right form of Participle I or II.
In the year 2000 the percentage of houses (to supply) by heat from district heating in some European countries was very high.
Чтобы правильно вставить глагол в нужной форме (Participle I или II), давайте сначала проанализируем предложение.