一、单项填空 在A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该题涂黑。（本大题共14，每小题1分）
1. It is said that _________mobile phone was invented not very long ago.
A. a B. the C. one D. 不填
2. —How much did you _________him for the house?
—I _________ him 2000 dollars for it but he wouldn’t accept it.
A. cost; paid B. take; offered C. spent; paid D. pay; offered
3. _________ Mrs. Jones_________Dr. Simpson shows great interest in the subject which we are talking about.
A. Both; and B. Either; nor C. Not only; but also D. /; and
