After designing more experiments,they were able to clarify the procedure   bees communicate information that they use to find and fetch food.
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A
by which
B
in which
C
by that
D
for which
推荐题目
 While watching television, ________.    
#68458
A
the doorbell rang
B
the doorbell was rung
C
we heard the doorbell ring
D
we heard the doorbell rings
. I have no idea _______ he left the party without _______ .
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A
why; noticing
B
how; being noticed
C
whether; notices
D
that; notice