Ⅰ.单句语法填空
1．They arrived at a farmhouse, in front of which sat a small boy.
2．The engineer, with whom my father works, is about 50 years old.
3．He is good at English, as we all know.
4．Li Ming, with whom I went to the concert, enjoyed it very much.
5．The letter is from my sister， who is working in Beijing.
6．In our factory there are 2,000 workers, two thirds of
whom are women.
7．I lost a book, whose title I can't remember now.
8．Last summer we visited the West Lake, for which Hangzhou is famous in the world.
9．This machine, which I have looked after for many years, is still working perfectly.
10．He is working hard, which will make him pass the final exam.
