Join the parts of the sentences

• I have a large collection of old books, some of which are quite valuable.
• He failed his driving test again, which made him rather depressed.
• He speaks fluent Polish, which is very difficult to learn.
• I'm going out for a meal with Julie, who works in my office.
• She has four aunts, neither of whom was very bright.
• They come from Taunton, which is in south-west England.
• They went into the living room, where the guests were waiting.
• It rained for weeks, which was good for the farmers.
• He had two brothers, one of whom works for BBC.
• You know Alan, whose wife had a baby in the summer.