Combine each pair of sentences into one, using a suitable Relative Pronoun
45. New York is the city. He visited it when he was in America last year.
46. We visited the factory. Many modern cars were painted in that factory.
47. December is a month. It is the coldest in the USA in this month.
48. London is a big city. We spent our vacation there.
49. The room is very nice. I’m living in that room.
50. We have not decided the day. We’ll go to London on that day.
51. The school is smaller than mine. You work here