A．littersB．intervenesC．jotsD．leads

【C6】A．magnifiesB．intervenesC．containsD．maintains

Stomach ulcer can lead to stomach cancer. 查看材料A.Ri

A．lead toB．comes fromC．lie inD．results in

【C19】A．lead offB．lead withC．lead toD．lead in

A．lead toB．result fromC．see offD．make up

Poor diets can lead to such diseases as rickets a