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Open the brackets and complete the sentences using past simple, past continuous or past perfect. 1. Our teacher explained to us that Americans (wrote/had written) their Constitution 200 years before and it (worked/was working) still. 2. I was not sure that in the USA the judges (worked/had worked) in the Supreme Court as long as they (lived/were living). 3. When my brother (came/was coming), I just (finished/had finished) reading the documents. 4. William (signed/had signed) all the papers by 6 o'clock, 5. The Conference (began/had begun) before James (arrived/had arrived).

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