A.so difficult a work | B.such a difficult work |
C.so difficult work | D.such difficult work |
A.which | B.that | C.who | D.whom |
A.that | B.whom | C.to whom | D.who |
A.is the matter | B.is matter | C.a matter is | D.matter is |
A.who | B.which | C.whom | D.when |
A.whose | B.who | C.whom | D.which |
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