Zhengzhou was attacked by such a terrible sandstorm ________ few residents had ever experienced before.
| A．which | B．as | C．where | D．that |
I think ___ knowledge of the Internet is ____ must in our work today.
| A．a…..a | B．the….an | C．the….the | D．/…an |
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ______.
| A．intention | B．attempt | C．purpose | D．desir |
They are ___ little children that we all like them.
| A．so | B．such | C．very | D．quite |
It has been announced that passengers ____ remain in their seats until the dangerous subjects have been removed.
| A．can | B．will | C．may | D．shall |
His careless driving ___ him his life last year.
| A．spent | B．paid | C．took | D．cost. |