go to English corner or speak English with your roommates. day by day, step by step, you'll gain the fruit.you ought to read more . if you have nothing in your mind , then how do you manage to speak . practice makes perfect . practice is a factor that we shouldn't neglect .we should speak as much as possilble . Imitation is your best oral english teacher. So, start from imitating other's pronunciation and intonation if you really wanna brush up your spoken english. of course, you can download the oral English software by the handset or search for the oral English online. Setting down in your small notebook is the important step! And in your space time you are surposed to recite them. In the final,good luck to you!