Exercícios com o tempo Past Perfect Continuous em Inglês

Assinale a alternativa correta usando o Past Perfect Continuous (Passado Perfeito Contínuo) em inglês.
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They ______________ for Peter for two hours before he finally came.
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When they arrested him, they told him they ___________ him for several months.
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We ______________ for 20 minutes before it began to rain.
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I ______________ hard, so I felt very tired.
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He ____________ at that company for four years when it went out of business.
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How long ______________ to get on the train?
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I wanted to sit down because I ______________ this whole morning.
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Rose said she ______________ so much in one day.
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She looked tired because she ______________ all night.
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Her eyes were red and puffy because she ______________.
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