of造句 fall

造句：

①One night there was a heavy fall of snow.

一天晚上天降大雪。

②She watched the gentle rise and fall of his chest as he slept.

她看着他睡着時微微起伏的胸膛。

③The fall of the Berlin Wall symbolized the end of the Cold War between East and West.

柏林牆的倒塌象徵着東西方冷戰的結束。

應該是fall off 跌倒，而不是fall of，譬如He fell off his bike on the way to school.