摘要： Only by changing the way we live can we save the earth.
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_______ changing the way we live can we save the earth．
- A.Only if
- B.If only
- C.Just by
- D.Only by
_______ changing the way we live can we save the earth．
[ ]
A．
Only if
B．
If only
C．
Just by
D．
Only by
Only by changing the way we live ______ the earth.
A. can we be able to save B. can we save
C. can we be saved D. we will be able to save