[на 100% верно] Объедините два предложения в одно с завершенной формой причастия I согласно модели. I found a lot of interesting expressions. I had read a text in English.

Объедините два предложения в одно с завершенной формой причастия I согласно модели.

Model:

The English teacher gave the students a brief test. She had explained a new rule.

Having explained a new rule the English teacher gave the students a brief test.

I found a lot of interesting expressions. I had read a text in English.

....  in English I found a lot of interesting expressions.