Combine each pair of sentences into one, using relative pronouns / adverbs

Combine each pair of sentences into one , using relative pronouns / adverbs
1 The man was Mr John . I saw him at the cinema last night 
2 The office is on the 22nd floor . i work in that office 
3 The people were very nice . we visited them two days ago
4 Do you know the boy ? He brrowed that book 
5 You should meet the man . i'll send this letter to him
6 .They invited us to the house . They bought is last month 
7 Do you know the name os the hotel ? John is staying in that hotel 
8 We haven't decied the day . We'll go to London on that day 
9. The dress is new . She is wearing it 
10 Alice is my friend . Alice's mother died last year