题目

Our hometown is becoming. A. beautiful and beautiful                   B. more beautiful and beautifulC. more beautiful and more beautiful   D. more and more beautiful 答案：D。考查形容词比较级的用法。比较级连用表示“越来越……”, 构成为: “比较级+and+比较级”或“more and more+原级(多音节词或部分双音节词)”, beautiful是多音节形容词。如图，在△ABC中，已知DE∥BC，DF∥AC，AD=4BD，S△ABC=50cm2，则平行四边形DECF的面积S= ．