(2010·厦门外国语学校检测)The population of Africa is so rapidly as to cause concern of the whole world. A.expanding B.stretching C.extending D.spreading 解析:expand不仅可指尺寸的增加.还可指范围或体积的扩大,stretch一般指由曲变直.由短变长的伸展,extend指空间范围的扩大或长宽的向外延伸.也可指时间的延长,spread一般指向四面八方扩大或传播. 答案:A 【查看更多】
