the patient suffering from a cough soon found it necessary to give up smoking为什么不用it is necessary
问题描述：
the patient suffering from a cough soon found it necessary to give up smoking为什么不用it is necessary
答
不能用it is necessary.如果用的话就必须加上that作为从句出现：the patient suffering from a cough and soon found that it is necessary to give up smokingfind it necessary to 是固定词组：必要的...