11.Didn't you see the man ____ ?

　　A.I nodded just now B.whom I nodded just now C.I nodded to him just now D.I nodded to just now

　　12.The radio set ____ has gone wrong.

　　A.I bought it last week B.which I bought it last week C.I bought last week D.what I bought last week

　　13.Have you seen the girl ____ ?

　　A.that I told B.I told you of C.whom I told you D.I told you of him

　　14.Who ____ has common sense will do such a thing?

　　A.which B.who C.whom D.that

　　15.I'll tell you ____ he told me last week.

　　A.all which B.all what C.that all D.all

　　16.Each time ____ they met they would talked long hours together.

　　A.which B.during C.when D.不填

　　17.I,___ your good friend,will try my best to help you out.

　　A.who is B.who am C.that is D.what is

　　18. ____,the compass was first made in China.

　　A.It is known to all B.It is known that C.We know all D.As is known to all

　　19.He must be from Africa,____ can be seen from his skin.

　　A.that B.as C.who D.what

　　20.Please lend us ____ tool as was used the other day.

　　A.same B.as C.the same D.that