(·安庆模拟)So far what we have done is destroying the earth; only by changingwe livewe sa

问题补充：

(·安庆模拟)So far, what we have done is destroying the earth; only by changingwe livewe save it.

A. that; will

B. how; can

C. what; do

D. which; shall

答案：

A. that; will

(答案→)B. how; can

C. what; do

D. which; shall

解析：选B。考查名词性从句和倒装。句意: 到目前为止, 我们的行为是在破坏地球, 只有我们改变了生活方式, 我们才能挽救它。live为不及物动词, 可排除C和D项。will表示将来和意愿, 根据句意应选B。