1.Ihavemanybooks,someof__________areonchemistry.
A.themB.thatC.whichD.those
2.Theywereinterested__________youtoldthem.
A.inwhichB.inthatC.allthatD.ineverything
3.Theastronautdidmanyexperimentsinthespaceship,__________muchhelpforknowingspace.
A.whichwethinkitisB.whichwethinkareof
C.ofwhichwethinkisD.Ithinkwhichisof
4.Thegreatdaywelookedforwardto__________atlast.
A.comeB.cameC.comingD.comes
5.Ilikethesecondfootballmatch__________washeldlastweek.
A.whichB.whoC.thatD./