(2013·长沙高考模拟)I him in time, otherwise he would have fallen off the bike.
A. had supported
B. supported
C. have supported
D. support
网友回答
A. had supported
(答案→)B. supported
C. have supported
D. support
解析：B 句意：我及时扶住了他，否则的话他就从自行车上摔下来了。support这个动作发生在过去，因此用一般过去时。