According to statistics，a man is more than twice as likely to die of skin cancer________a woman.
| A．than | B．such |
| C．so | D．as |
The key _________ the string was put into the door to stop the kite _________.
| A．tie to;flying away |
| B．tying to;fly away |
| C．tied to;flying away |
| D．tied to;fly away |
_________ that he had fallen behind,he tried to work harder.
| A．Having realized | B．Realized |
| C．Realize | D．To realize |
Plastic and rubber won’t _________ electricity,but copper will.
| A．have | B．do |
| C．pass | D．conduct |
________ no need for everybody to discuss the problem again since it has already been solved.
| A．It has | B．There has | C．We have | D．There is |
I didn't like aunt Lucy,who __________ without warning and bringing us presents.
| A．always turned up |
| B．has always turned up |
| C．had always turned up |
| D．was always turning up |