In many ways, on a bike is similar to a car .A. to riding; drivingB. to ride; driving C.

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A. to riding; driving
B. to ride; driving
C. ride; drive
(答案→)D. riding; driving
解析：本题考查非谓语动词。be similar to 与……相似。to是介词，后接doing形式；结合句意：“在许多方面，骑自行车与开车相似”可知说的一般情况，故第一个空用doing作主语。