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问题: 括号内改错

(To compare) to those of a hundred years ago, the airplanes are technically more complex, and( its speed greatly increases.)
A. To compare ...their speed is greatly increased.
B. Comapring ...the modern planes are faster
C. Compared...the modern planes are faster
D. Compared ...they are faster ever than before

解答:

选C吧
(Compared)这里是动词的过去分词做方式状语,如果复原成完整的条件状语从句的话应该是(If they are compared) to those of a hundred years ago, the airplanes are technically more complex, and( the modern planes are faster.)第一个括号内的答案可以确定后,排除A,B两项,第二个空之所以选C是因为D项的语序有误,正确应该是than ever before.