Question

—Have we ________water?

—Yes, ________. We’d better get some.

1. A.
   given out; we have run it out
2. B.
   run out of, our water has run out
3. C.
   used up; our water has been run out
4. D.
   run out; our water has run out

Answer 1

B
考查短语：run out of 用完，是及物动词短语，后需要加宾语， run out被用完，不及物动词短语，无被动语态。句意：你们用完水了吗？是的，水已经被用完了，我们最好去取一些。所以选B。