it is prohibited by law to mail through parcel post any merchandise that might prove__in transport.
问题描述：
it is prohibited by law to mail through parcel post any merchandise that might prove__in transport.
a.dangerous
b.with danger
c.dangerously
d.to the danger
请理由充分．
答
选A
b和C都是修饰动词prove的,
句子的意思是 ：法律禁止邮寄有可能被证明在运输过程有危险的包裹.
dangerous 是修饰包裹的, D 但配错误,prove to be danger,顾选