Which river is the main source of London' water supply?

Which is longer?The Yangtze River or The Yellow River? Which is the longest river?怎么回答 Which is the longest river in England? which is the longest river in the world?the changjiang river What which is the longest river in China? Which is bigger ,Changjiang or the Yellow River?(中文) Which river is the main source of London' water supply? Which is the biggest country:the United Kingdom,France or Spain?Which river flow through London? Don’t swim in the river which there is a boat.用which还是where,为什么? 括号内填什么which is () ,the Yangtze River or the Yellow River?A.a bit longB.longerC.more long The river on which a new bridge is being built is 209 meters wide. Which is the longest river in China?How long is it?中文及其回答? Which is the longest river in china How long is it? 连词成句.1.the world is longest which river in the )2.the city has which population lowest density ) which is the yangtze river or the yellow rivera a bit longb longerc more long 单句改错 The river,whose the banks of which are covered with trees,is very long It is famous for the Haihe River which runs through the city.翻译 （ ）Which river is longer ,-------Nile or---------Amazon?A.On B.a,/ C.the,the D/,/