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she has done her homework yet 
there are a lot of different office in westminster
westminster abbey is one of the most famous church in London
They didn't see him today 
our teacher was to london two years ago 
it takes an hour for him to do the shoping

She hasn't done her homework yet.There are a lot of different offices in Westminster.Westminster Abbey is one of the most famous churches in London.They haven't seen him today. Our teacher went to London two years ago. It takes him an hour to do the shopping.