The quality of life had improved ( ) and there was a marked change in life style.
A、considerately
B、considerably
C、desperately
D、essentially
【正确答案】：B
【题目解析】：consideately 考虑周到地；considerably相当/非常；desperately 绝望地；essentially 必不可少地。句子含义是生活质量极大改变，这是生活方式标志性的变化。
