--The radio isn't working.I wonder what's happened to it.--Have you____ the batteries?
问题描述：
--The radio isn't working.I wonder what's happened to it.--Have you____ the batteries?
--The radio isn't working.I wonder what's happened to it.
--Have you____ the batteries?
A.tried to change
B.tried changing
C.managed to change
D.managed changing
意思是什么///
答
B.tried changing
收音机没动静了.什么情况啊?
换个电池试试.