A．advantages
B．blossom
C．brains
D．brilliant
E．deserve
F．gravely
G．head
H．influence
I．intelligent
J．nearly
K．parental
L．problems
M．produce
N．shaped
O．survives

A．Group dynamics can be expanded by the group dominator.
B．Side conversations may bring down a group’s intelligence.
C．The absence of the team leader does harm to the main discussion.
D．A group’s intelligence is related to members’ direct communication.