Preparing (27) _____ this program, the Organizing Committee has signed a

Câu hỏi :

Preparing (27) _____ this program, the Organizing Committee has signed a contract with Martin - a bicycle-making firm - to purchase 1,000 bicycles, at prices from 850,000 to 1,000,000 VND per bicycle -10% lower than market prices, with nearly 20 different models.