1.During the 1990s, 21 million people died as a result of smoking cigarettes.
as a result of\ because of + n. pron. v-ing 因为，由于
由于粗心驾驶的结果,他最后被送进了医院.
He ended up in hospital as a result of his careless driving.
as a result 表示结果; as a result of 表示前面的原因.
There was a terrible accident, _________ , I was late for school.
Many people died ___________ smoking.
