Question

【题目】There has to ______ a well-developed system that can give people a warning when a tsunami is ______ the way.

have；in

be；in

have；on

be；on

Answer 1

【答案】D

【解析】本句题意应为“必须要有一个完善的系统，它能在海啸即将到来时想人们发出警报”。第一空考查there be 句型。