1.他们正在寻找生命，但是他们还没有任何发现。
They are ______ ______ life but they ______ ______anything yet.
2.迄今为止，只有地球上有生命存在。
______ ______there's only life______ ______.
參考答案:looking for haven't found
By far on earth
1.他们正在寻找生命，但是他们还没有任何发现。
They are ______ ______ life but they ______ ______anything yet.
2.迄今为止，只有地球上有生命存在。
______ ______there's only life______ ______.
參考答案:looking for haven't found
By far on earth