Scientists study ________ human brains work to make computers.       
#78771
A
when
B
how
C
that
D
whether
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— The light is still on in his room. Do you know _________?— In order to practise for the English singing party.
#37632
A
if he works hard
B
who he is studying with
C
why he is so busy
D
when he will stop working
—Excuse me, do you know ________________?—Oh, no! Nothing is wrong with her.
#37553
A
what’s wrong with her
B
what wrong is with her
C
what is the matter to her
D
what the matter is to her
Do you want to know ____?
#39278
A
what does it need
B
what it needs
C
it needs it need
D
what needs