I'm afraid he's more of a talker than a doer，which is ________ he never finishes anything.(2011·山东)
A．that B．when C．where D．why
I'd like to start my own business—that's ________ I'd do if I had the money.(2011·江西)
A．why B．when C．which D．what
(2012·四川)Scientists study ________ human brains work to make computers.
A．when B．how C．that D．whether
(2012·福建)We promise ________ attends the party a chance to have a photo taken with the movie star.
A．who B．whom C．whoever D．whomever
(2012·辽宁)The newcomer went to the library the other day and searched for ________ he could find about Mark Twain.
A．wherever B．however
C．whatever D．whichever
His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽)
A．that B．how C．who D．what
