用下列词填空:which, as, when, who, whom, where, when, why, that. 1.This is the very house _____ he lived. 2.In Xi’an, I met a teacher, ____ has a strong love for cultural relics and took me to visit the history museum. 3.That’s the reason ____ he was late. 4.They are always smoking, _____ of course, will do harm to their health. 5.The pictures brought the days back to the past _____ they swam in the river.