下列树种的花型中，属于蝶形花的树种是（）
A.国槐
B.桂花
C.梅花
D.碧桃
参考答案：A
Can you tell me _______to talk to and ________to get help when we have problems?
A．who; where
B．who; what
C．what; who
D．where; when
