Question

麻烦详细解释下下面3个选择题怎么做，

She__the door before she goes away.
A had locked B is locking C has locked D was locking

It is high time you__in bed now
A are B were C will be D would be

The bridge which__last year looks really beautiful.
A was built B built C was set up D had been built

Answer 1

B 状语从句 主将从现， lock可以用现在进行时表示将来
D非谓语
D被动

追问

你三题全错，别出来丢人好吗

Answer 2

1. C 注意before 后的goes 是一般现在时， 根据前后时态一致的原则，排除AD，因为它们是过去的时态。因为B是现在进行时，而题目是她走之前就应该把门锁好了，所以是完成时
2. B It's (high)time后面要用过去时态，排除AC，再看时间标志now, 排除D（将来时）
3. A 把握住被动和句意就可以了，首先排除B，再看时态last year，排除D，桥是被建的，所以排除C