1．mr smith, from ________ i have learned a lot, is a famous scientist. 2．the boy, ________ father is an engineer，studies very hard. 3．our guide, ________ was a french canadian，was an excellent cook. 4．finally we visited the giant yangtze gorges dam, ________ is the greatest water control project in the world at present. 5．after graduation, i decided to stay in chongqing, ________ i was born. 6．last summer we visited the west lake, for ________ hangzhou is famous in the world.
