That is the b---- of this sad story.

That is the beginning____ of this sad story。There is a museum in our town。We often go there for a visit_____。__Take____ __a___ _walk____ (漫步) through the park on First Avenue。Near here is a beautiful park ____ a nice lake in it 。A。on B。of C。with D。fromC。with 在这附近, 有一个美丽的公园, 它里面(带)有一个湖。with 表示,伴随,带有。其它的没有这层意义。