1,The population of Wellington__________ 343000,most of _______ like water sports.
A.is;who B.are;who C.is;whom D.are;them
2,If only he _________ quietly as the doctor instructed,he would't suffer so much now.
A.lies B.lay C,had lain D.should lie
3,Great changes _________ in our city in the past twenty years.
A.have been taken place B.have taken place C.took place D.were taken place
4.All the towns and villages down by the Huaihe River _________ many times by the end of last month.
A.have been flooded B.had been flooded C.have flooded D.had flooded