第33题: [单项选择]__________to some parts of South America is still difficult, because parts of the continent are still covered with thick forests. A. Orientation B. Access C. Procession D. Voyage 参考答案:B 答案解析:Access是“接近,到达”。A.Orientation是“定位,定向”;C.Procession是“游行,队伍”;D.Voyage是“旅行,航行”。