1  He is still devoted to his research  although  most of  the experts______little importance to it. 

A.     attach    B. put    C. focus      D. pay        

2 Being  too busy with his work£¬how he dreams of _______enough time for a good relaxation!

A. to have   B. being     C. there being     D. giving    

3 The computer system _______suddenly while he was searching for information on the Internet.

A. broke down     B. broke out      C. broke up      D. broke in