contractor
n person or firm that does jobs (esp construction) under contract 订约者; (尤指建筑工程的)承包人, 承包商
a building contractor 承建商
a firm of defence contractors, ie who make weapons, etc 军火承包商
Who were the contractors on the new motorway? ie Who built it? 谁是这条新高速公路的承包人?
Of course he is. He's very successful. He's made lots of records. They broadcast a programme of his music last month on the radio. Why don't you come on Saturday? I think you'd enjoy it.