use the correct form of the verb in brackets in the active voice. translate the sentences into russian
1.if any species in the food chain (to disappear), there (to be) a disbalance in the whole ecosystem.
2. as soon as the environment of a species or a population (to develop) in an unfavourable way.it (to cause) an ecological crisis.
3.if ecologist (not/to make) soil and water analyses, they (not/to be able) to estimate the environmental pollution.

dilyara112005    2   01.10.2019 22:52    0