Scientists study ___________ human brains work to make computer.
#31794
A
when
B
how
C
that
D
whether
推荐题目
John felt very embarrassed ________ he entered the government hall.
#30995
A
for the moment
B
the first time
C
for the first time
D
at the moment
 Don’t lose heart _________ you fail.
#31772
A
until 
B
as if 
C
unless  
D
even though
The hungry man eats his food _______he hadn ' t eaten for a  week.
#32409
A
as if
B
even though
C
such as
D
like as