用下列句式造句 主语+spend+some time/some money 【in】 doing sth 主语+spend+sometime/some on sth It takes sb/some time/some money to do sth 主语+pay+money+forsth 物+cost+sb+钱
i spent two hours working out this problem. i spent two hours on this problem. it took me two hours to work out this problem. i spent 10 yuan on this book. i paid 10 yuan for this book. this book cost me 10 yuan.