问题补充：
Rather than on a crowded bus, he always prefers a bicycle．
A. ride; ride
B. riding; ride
C. ride; to ride
D. to ride; riding
答案：
A. ride; ride
B. riding; ride
(答案→)C. ride; to ride
D. to ride; riding
解析：考查prefer用法。Prefer的固定词组：prefer to do sth rather than do sth宁愿做…也不愿做…、本题只是把rather than do sth提前。故C正确。
