中国大学MOOC: forefront的意思是______________.

We are at the _______of technology and skills. A: perspective B: forefront C: ground

I'm hoping to buy an apartment _________ of 5,000,000 yuan. A: at the cost B: in the case C: at the forefront D: in the neighborhood

________’s success brougt Toni Morrison to the forefront of American fiction. A: Song of Solomon B: The Bluest Eye C: Beloved D: Sula