I’m afraid he’s more of a talker than a doer,which is ________ he never finishes anything. (2011·山东,26)
A.that B.when
C.where D.why
Scientists study ________ human brains work to make computers.(2012·四川,17)
A.when B.how
C.that D.whether
It suddenly occurred to him________he had left his keys in the office.(2012·江西,25)
A.whether B.where
C.which D.that
Jerry did not regret giving the comment but felt ________ he could have expressed it differently. (2012·北京,24)
A.why B.how
C.that D.whether
As many as five courses are provided,and you are free to choose ________ suits you best. (2012·陕西,20)
A.whatever B.whichever
C.whenever D.wherever
It doesn’t matter________you turn right or left at the crossing—both roads lead to the park. (2012·天津,9)
A.whether B.how
C.if D.when