Complete the sentences .Use the verb in the correct tense. 1.A lot of cities and towns ------- ( to situate) in Ukraine . 2. The nuclear power station -------( to found ) in 1990. 3. A film about nature ------( to show ) alread...

Complete the sentences .Use the verb in the correct tense. 1.A lot of cities and towns ------- ( to situate) in Ukraine . 2. The nuclear power station -------( to found ) in 1990. 3. A film about nature ------( to show ) already. 4. The ecosystem of the river -----( to clean ) next spring