【1】A.What B.Whose C.What's D.Who's【2】A.the B.a C./ D.an【3】A.hers B.his C.mine D.yours【4】A.a pair B.pair C.a pair of D.a pairs of【5】A.them B.it C.they D.its【6】A.you B.your C.yourself D.yours【7】A.in B.on C.at ...