问题详情

B
Bruce :Mum， this is my friend， Frank．
Frank :Nice to meet you， Mrs Collins．
Mrs Collins :Nice to meet you， too， Frank．
Bruce :And these are my grandparents， Leo and Ruth Collins． That"s my broth
Kevin， and this is my cousin， Peter．
Frank :And is this your sister？
Bruce :Yes， this is Emily．
()26． Bruce and Peter are____．
A． brothers
B．sisters
C．cousins
D． cousin请帮忙给出正确答案和分析，谢谢！