computers(二)
主讲教师：麻雪玲
北京市英语教师
本讲目标
被动语态
被动结构：be+done
一般现：____________+done
一般过： ____________+done
一般将： ____________+done
现完： ____________+done
过完： ____________+done
题一：
in the last few years thousands of films _____ all over the world.
a. have produced b. have been produced
c. are producing d. are being produced
