1£®They arrived at a farmhouse£¬in front of which sat a small boy.

2£®He is good at English, as we all know.

3£®The person£¬with whom I worked£¬had to stay home for a month.

4£®It's not a job for anyone who is slow with numbers.

5£®In our factory there are 2,000 workers£¬two thirds of whom are women.

6£®I lost a book, whose title I can't remember now.

7£®She's got a part­time job for which she earns 2,000 yuan a month.

8£®The files are now in a safe to which only he has the key.

9£®He is working hard, which will make him pass the final exam.

10£®I have two grammar books£¬both of which are of great use.