Complete the sentences with the past continuous passive form of the verbs.
1 A film while Candido Rondon and Theodore Roosevelt explored the Amazon Valley (make)
2 During Rondon's lifetime, new roads also ___ to connect parts of Brazil. (build)
3 By the time Rondon finished his work, the telegraph system ___ much.(not use)
4 Rondon was shocked to find out that the indigenous tribes with respect by all explorers. (not treat)
5 Before Rondon's work, the rivers and the rainforests only by the tribes. (use)​

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