1.James has three sisters,all of _____ are married.
a.who b.whom c.them d.which
2.That famous researcher died all of a sudden,_____ the project unfinished.
a.leaving b.left c.leave d.and leaves
3.A backpacking subculture _____ in Kathmandu,Goa,and Bangkok since it became part of the "hippie" routes in the 1960s.
a.exist b.existed c.has existed d.had existed
以上三題請個位高手幫解，我選的答案分別是cdd，在請個位幫我過目一下，謝謝!!!