C. found D. to have found

　　(2) Only_______costs will Power Date hold its advantage over other companies.

　　 A. to keep downB.by keeping down

　　C. keeping downD.to have kept down

　　12.

　　(1) He is the only one of the students who_______a winner of scholarship for three years.

　　(2) He is one of the students whoa winner of scholarship for three years.

　　A. isB. are

　　C. have beenD. has been

　　13.

　　 (1) So difficult_______it to live in an English-speaking country that I determined to learn English well.

　 (2)_______it so difficult to live in an English-speaking country that I determined to learn English well.

　　 A. I have feltB. have I felt

　　C. I did feel D. did I feel

　　14.

　　 (1) If you want help-money or anything, let me know,_______ you?

　　 (2) It's said that it is going to be fine tomorrow. Let's go camping,_______ we?

　　 A. don't B. will

　　C. shall D. do

　15.

　　(1)-Sorry to have interrupted you, please go on.

　　 -Where was I?

　　-You_______you didn't like your father's job.

　　(2)Can you tell what is in his letter to you?

　　He_______he would come to see me very soon.

　　 A. had said B. said

　　C. were saying D. had been saying

　　16.

　　(1)How I wish every family_______a large house with beautiful garden!

　　(2) How I wish I_______a lot of books to read when I was young.

　　 A. hasB. had