Therehasto     awell-developedsystemthatcangivepeopleaw...

问题详情：

There has to      a well-developed system that can give people a warning when a tsunami is         _______ the way.

       A．have…in             B．be…in                 C．have…on              D．be…on

【回答】

D

知识点：动词

题型：选择题