câu 1 : use a relative pronoun or a relative adverb to combine each pairs of the sentences below ; 1 cúc phương is a famous nation park . i came there along time ago 2 he is a manager in this factory . you have talked to his mother in the company 3 trịnh công sơn composed songs . they are greatly liked by millions of vietnamese people 4 john bridge is ione of my oldest songs . he has just gone to live canada 5 the earth is a planet . it can support life 6 he is famous doctor in my neighbor . you have just me his daughter last night 7 tet is a big occasion . the members of family gather on this occasion 8 the scientists are making progress . they are researching the causes of cancer 9 then he was caught in the mouth of a white shark . it is one of the most dangerous sea creatures 10 the most beautiful park is opposite my house . it has a lot of big trees 11 a waitress served us . she was very impolite and impatient 12 a building was destroyed in the fire . it has now been rebuilt 13 some people were arrested . they have now been released 14 a bus goes to the airport . it runs every half an hous 15 chinese people have a very special kind of soup . this kind of soup is made form shark’s fin 16 many people get sick or die every year . these people eat puffer fish , a very poisonous species