底角等于顶角一半的等腰三角形是______三角形，画出此三角形斜边上的高，这时图中有______个等腰三角形．

(2013·陕西重点中学高三二模)We pursue happiness, thinking one day we will find it. But ________ it by seeking it.

A．rarely will we find

B．rarely we will find

C．rarely will find we

D．rarely find we will