问题

In the last decade, disasters havebecome increasingly common. It’s high time that we ______these issues moreseriously.

A:/a
B:have taken
C:had taken
D:are taking

正确答案是：

同类题型

How do you know that she likes singing-I often hear herafterclass.

Though _____money, his parents managed to send him to university.[ ]

According to Chinese law, every child _____get nine-year compulsory education.

He got annoyed, _______it wasn’t his fault if he couldn’t play as well as me, and that I shouldn’t talk to him in this manner.

I wonder________there are so many naturaldisasters across the world in 2010.