5B,Dunhuang building,Zhuzilin,Futian District,Shenzhen,Guang

—How ___ is it from Xi’an to Dunhuang?—It’s less than 3 ___ flight. A．long, hour’s B．far, hour’s C．long, hours’ D．far, hours’

六道英语选择题,求详解>A
Recently,Dunhuang was hit by the strongest sandstorm this year and the sand and dust weather___for four days.(C)
A.was lasted B.had been lasted C.lasted D.had lasted
A computer is so useful a machine____we can use everywhere.(C)我选了B A.that B.which C.as D.what
Einstein,for_____life had once been very hard,was successful later in science.(A)“For”表示什么?“For……hard”是一个定语从句吗?“whom”是什么成分?
A.whom B.whose C.which D.his
The river,_____the banks are coverd with trees,is very long.(C)
A.whose B.which C.of which D.which of
We can never forget the days ____the two astronauts in spaceship worked together and the daya___we spent rogether.(A) 我选了B
A.when;which Bwhich;when C.what;that D.on which;when
There are no children ____love their parents.(A)我选了B
A.that do not B.who dose not C.that Dwho
括号里面填的是正解.求大神每道详解拯救ORL

If I’m free,I’d like to spend ______holiday in Dunhuang. A．three days B．a three-day C．three-day D．three day