Question

______ the students found the soldier’s idea interesting, the system was too difficult to be of practical use.

A．While

B．Unless

C．As soon as

D．Even if

Answer 1

A

考查状语从句的连词。A尽管；B除非，如果不；C一…就；D即使；句意：尽管学生们认为士兵的想法很有趣，但是这个系统还是太难了而不实用。