问题
选择题
Tom was so careless that he _____ his right arm when he was riding to school.
A．hurts
B．hurt
C．has hurt
D．had hurt
答案
答案：B
考查时态。句意：汤姆太粗心了以至于当他骑自行车去上学时伤了右胳膊。是他上学时发生的事，上学发生在过去，所以用一般过去时态。选B。
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