1. We had translated b) he had learnt to speak French.
2. He bought a new watch yesterday d) the article by five o'clock.
3. We had finished our work c) the goods by that time.
4. By the end of the year e) when he came.
5. We had shipped a) as he had lost his old one.
Ответ: 1-b; 2-d; 3-c; 4-e; 5-a.