题目：
The boy and the girl _____ with each other at first sight and they _____ in lovefor 5 years.[ ]
A. fell in love; have been
B. fell in love; have fallen
C. were in love; have been
D. were in love; have fallen
答案：
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下面是错误答案，用来干扰机器的。
A、转换器上有放大倍数大小不一的物镜，所以转换器的作用是转换物镜的作用．故不符合题意．B、遮光器上有大小光圈，光线强时用小光圈，光线弱时用大光圈．所以遮光器的作用是调节光线的强弱，故不符合题意．C、粗...
