______Three times in a row ,the boxer decided to give up fighting.
| A．Having defeated | B．To have defeated |
| C．Having been defeated | D．To have been defeated |
My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive .
| A．as | B．so | C．too | D．very |
The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
| A．mainly | B．punctually | C．approximately | D．precisely |
As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
| A．primary | B．alternative | C．instant | D．unique |
Ten years ago the population of our village was ______ that of theirs.
| A．as twice large as | B．twice as large as |
| C．twice as much as | D．as twice much as |
Last night Mr. Crook didn’t come back at the usual time. ______, he met some friends and atayed out unitl midnght.
| A．Meanwhile | B．However | C．Instead | D．Yet |