There------ a number of natural mysteries in

试题：

There______ a number of natural mysteries in the world that even make scientists ______. A．exists; confusing B．are existed; confused C．exist; confused D．exist; confusing

动词, 动词短语

答案：

C

there be /exists,stands,lies“存在，有”。scientists 是“感到迷惑的”，所以答案C。