1. would never forget; 2. While the children are
staying at their grandmother's, let's go out for the
evening, shall we?
3. The tea tasted as if it had been made with sour milk.
4. ... would you still go on a second date?
5. had been walking; had been lost
6. Ken could see at once that the site chosen by the city
council for its new art museum, a former wine-bottling warehouse
in the centre of town, was a non-starter.