The leaders have done everything they can _____ people's living conditions.A improving B improved C to improve D improves
问题描述：
The leaders have done everything they can _____ people's living conditions.
A improving B improved C to improve D improves
答
C.
do something to***.这种用法很常见。
答
B improved
答
C
动词不定式表示目的状语,they can是定语从句,修饰 everything
主要句子是：the leaders have done everything to improve .
*做了他们能做的所有事,为了提高人们的生活条件.