9.the office boy had told (told)me at noon…

8.I continued knocking (to knock)at the door…

7.the children must have come (should have come)back from school…

6.It really did not make (would not make,could not make)any difference.

5.I had left it on my desk

4.but I could not find (did not find)it

3.put my hand into my pocket to take out my key

2.I walked up to the door…

1.It was getting dark…

(A)1.No, he isn't.　　　　　　　　 (B)2.three-fifths

(A)3.except　　　　　　　　　　　　 (C)4.He was told

(D)5.for　　　　　　　　　　　　　 (B)6.spoken

(D)7.make friends with　　　　　　 (C)8.belong to

(C)9.doesn't fit　　　　　　　　　 (A)10.has been in

(C)11.either　　　　　　　　　　　 (B)12.nice

(D)13.worse　　　　　　　　　　　　 (B)14.less, fewer

(A)15.Mary's mother's　　　　　　　 (B)16.will there

(C)17.the nurse is talking to　　　 (A)18.unless

(D)19.What fine weather　　　　　　 (C)20.laughing at