关于within的类动式用法The new power station is reported_________within three years.A.to completed B.having been completed C.to have completedD.to have been completed为什么选A啊,
问题描述：
关于within的类动式用法
The new power station is reported_________within three years.
A.to completed B.having been completed C.to have completed
D.to have been completed
为什么选A啊,
答
within 3 years表示将来 B C都不表示将来
题目没有表示到将来某个点会完成的意思 所以也不用D 不定式就是表将来的
i want to be a teacher 这里TO就是表将来的