НВ
Надежда Варунцева
Друзья помогите найти причастия настоящего и прошедшего времени. Подчеркнуть причастия.
1.Economists have long thought of the environment as an unlimited source of resources.
2.Having no sense of humor he couldn*t enjoy the joke.
3.It*s difficult for small developing countries to keep high agricultural level.