1.--------,after hours of climbing,we reached the top of the

1.________,after hours of climbing,we reached the top of the mountain.2.You used to live in Lon一、用含有at的词组填空1.________,after hours of climbing,we reached the top of the mountain.2.You used to live in London,didn’t you?Where are you living _________?3.Most of the time Pat is a very nice person,but _______ he can be very unpleasant.4._________ the police thought they had the right man,but later they realized their mistake.5.There must have been ________ 2,000 people at the concert.6.Doctor,my son has had a serious accident.Can you come _________?