There was an __________ relationship between the two companies. 2.The training center offers highly ________ courses for business and professional people. 3.I didn’t think our meeting was __________—you must have known I would be there. 4. I __________ locked myself out of the house. 5.The company has decided to take Nanjing as its ___________ base. 6.Copies of the book were ___________ free to each school in the district. 7.She will be unable to attend it because of a__________ engagement. 8.Manufacturers are making safety a __________. 9.There will be an exhibition of the ____________ of the automobile industry in our city next week. 10.One of the basic needs in many __________ countries is food.