问题
选择题
Every one of us must know this: _________ we live can we save the earth．
A．by changing the way only
B．by only changing the way
C．only by changing the way
D．by changing only the way
答案
答案：C
考查倒装句。从语境和选项的语序看，本题选C，用only+介词短语放在句首，后面接倒装句。