_______ the rain falling so hard, it becomes more and more difficult to carry on the rescue work.
| A．Since | B．As | C．With | D．For |
It's no _____ arguing about it, because he will never change his mind.
| A．time | B．while | C．use | D．help |
The city was _____ to me, and I didn't know where to go.
| A．interesting | B．large | C．strange | D．exciting |
The book is not _____ what we paid.
| A．worth | B．valuable | C．cost | D．dear |
The thief ran away at the _____ of a policeman.
| A．sight | B．screen | C．sound | D．seeing |
There are usually at least two _____ of looking.
| A．means | B．ways | C．directions | D．courses |