问三道关于语法的题目31.The scientists have made an exhaustive study of

问三道关于语法的题目
31.The scientists have made an exhaustive study of the virus ________ many people have been infected.
A.to which B.in which C.with which D.for which
32.The Swedish academy announced in Stockholm on October 11 that Mo Yan would receive the 2012 Nobel Prize for literature,________ him the first Chinese national to win the award.
A.making B.to make C.having made D.made
33.People are looking forward to the new,smaller iPad mini that ________ on sale in the coming season.
A.has gone B.will go C.go D.goes
31 C 32 A 33 B