问题
选择题
The reason _______ he felt frustrated was ______ he lost his MP4.
A．why/that
B．that/why
C．why/because
D．that / because
答案
A
题目分析：句意：他郁闷的原因是他丢了他的MP4。The reason why…is/was that…意为：…….的原因是……。why he felt frustrated是定语从句修饰the reason，that he lost his MP4是表语从句。故选A。
考点: 考查名词性从句的用法。