Circus tigers, although they have been tamed, can _____ attack their trainer.

　 A. unexpectedly　 B. deliberately　 C. reluctantly　　 D. subsequently

A computer is so useful a machine ________ we can use everywhere.

A. that　 B. which C. as D. what

Mum　　　 to us，“Be quiet!Your little sister’s sleeping.”?

A.whispered　　　 B.shouted?　　　　 C.explained　　　　　　 D.replied

Is this factory ____you visited last Friday?

A. where　　　　 B. in which　　　 C. the one　　　　 D. which

The maths problem can be______.
  A.easy worked out        B.easy to be worked out
  C.easily worked out      D.easily to work out

Maybe you have been to many famous restaurants, but nowhere else_____ on such nice ducks.

　 A. you can feast B. can you taste C. you can taste D. can you feast

She didn’t remember ______ him before.

A. having met　 　 B. have met　　

C. to meet　　 　 D. to having met

You are just ______ your breath trying to persuade him to give up smoking. He won’t listen to you at all.

　 A. holding　　 B. catching　　 C. saving　　　 D. wasting

I was born in New Orleans, Louisiana, a city 　　　 name will create a picture of beautiful trees and green grass in our mind.

A. which 　　　　　 B. of which 　 C. that 　　　　 D. whose