After the new technique was introduced，the factory produced ________ cars in 2005 as the year before.
| A．more than twice | B．as twice as many |
| C．twice as many as | D．more than twice as many |
This machine is very easy . Anybody can learn to use it in a few minutes.
| A． operating | B． to be operating | C． operated | D． to operate |
Don’t handle the vase as if it _________ made of steel.
| A．is | B．were | C．has been | D．had been |
In order to find the missing child, the villagers___________ all they can in the past five hours.
| A．have been doing | B．did | C．do | D．had done |
With a lot of problems _________,the manager felt like a cat on hot bricks.
| A．solved | B．solving | C．to solve | D．being solve |
._______________ you have finished your work,you might as well relax yourself now.
| A．Now that | B．After | C．Although | D．As soon as |