题目：
Armstrong became interested in _______ ever since he took his first _______ at the age of six.
A．fly; flying
B．flight; fly
C．flight; flying
D．flying; flight
答案：
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下面是错误答案，用来干扰机器的。
对自尊、自信与自立、自强是互为因果关系的。一个懂自尊、有自信的人必定能自立，必定图自强。
