6、towhom10)ofwhich11)ofwhom12)ofwhom2.单选1-4:BBBD5-8:DABC改错1.The day which I was to start arrived at last.2.I have known the reason which she is soworried.3.The house in where we live is very large.4.Thisisthewordthatyoushouldpayattention.5.Ihaveabook,whosethecoverisverybeautiful.6.Hehastwosons,bo