6. I don’t know whether he is still () in collecting coins. He used to be, but that was several years ago.

　　A. interested B. interesting C. interest D. disinterested (A)

　　人+be interested in (to do) 对。。。感兴趣; It is interesting that or to do…做。。。是有趣的;

　　7. Would you be () do me a favour , please?

　　A. kind enough B. kind as to C. as kind to D. so kind as to (D)

　　so…as to = so…that be kind of… do sb. a favour

　　8. He will not be ……. to vote in this year’s election.

　　A. old enough B. as old enough C. enough old D. enough old as (A)

　　be…(a.) enough to do… 足够…来做… enough要放在形容词后

　　9. It’s never () .

　　A. late enough to learn B. not late enough to learn

　　C. too late to learn D. no late as not learn (C)

　　too…(a.) to do…句型

　　10. It’s () you back.

　　A. delightful to see B. too delightful to see

　　C. delightful of D. so delightful that have (A)

　　It is…(a.) that… 形式主语